calcium oxalate, cac2o4, is very insoluble in water. what mass of sodium oxalate, na2c2o4, is required to precipitate the calcium ion from 37.5 ml of 0.104 m cacl2 solution?

The given statement  "a crystal is a single, continuous piece of a mineral bounded by flat surfaces that formed naturally as the mineral grew and it needs to be see-through" is True because a crystal is a mineral that is bounded by flat surfaces that is formed naturally as the mineral keeps growing.

Crystals are typically transparent or translucent and have a distinctive geometric shape. The size of a crystal can range from microscopic to a few centimeters.

The process of crystal growth can occur in one of two ways.

The first is through nucleation, which is when a particle, called a nucleus, begins to grow around the surface of the mineral. As it continues to grow, the nucleus will attract surrounding atoms and molecules, which then attach to the surface of the nucleus and form the crystal structure.

The second method is called epitaxy, and it occurs when a crystal already present in the environment will attract and attach surrounding atoms and molecules, thereby forming a new crystal structure.

Crystals can form in a wide range of shapes, sizes, and colors depending on the environment and the mineral from which they are formed. Additionally, different crystal shapes can often form from the same mineral depending on the environmental conditions.

In conclusion, it can be said that yes, a crystal is a single, continuous piece of a mineral that is bounded by flat surfaces that formed naturally as the mineral grew and it needs to be see-through.

To know more about Crystals, refer here:

https://brainly.com/question/13008800#

#SPJ11

The amount of kinetic energy required to strain the chemical bonds in substrates so they can achieve the transition state is the definition of activation energy.

What is Activation Energy?

Activation energy is the amount of energy required for a chemical reaction to occur. The energy that must be provided to molecules in order for them to react with one another is known as activation energy.

This can be accomplished in a variety of ways, such as by increasing the temperature or pressure, adding a catalyst, or irradiating the reactants with light.

Activation energy is defined as the energy required for the reaction to begin. It's the energy that molecules require to overcome the initial barrier so that a reaction may proceed.

When a chemical reaction occurs, the reactants must collide with one another with sufficient force and in the appropriate orientation to form products.

It's critical to note that activation energy is a form of potential energy that isn't included in the overall energy change of a reaction.

To learn more about activation energy refer: https://brainly.com/question/11291663

#SPJ11

The mass of metallic iron produced in the course of the reduction of 15.0 g of FeO with 3.0 g of Al is: 12.1 g.

To calculate this, we must consider the reaction that occurs:
FeO + Al → Fe + Al2O3

In this reaction, 1 mol of FeO reacts with 1 mol of Al to produce 1 mol of Fe and 1 mol of Al2O3. Since the given mass of FeO is 15.0 g and the given mass of Al is 3.0 g, we can calculate the number of moles of each reactant with the following equation:  n (reactant) = mass (reactant) ÷ molar mass (reactant)

[tex]n (FeO) = 15.0 g ÷ 71.84 g/mol = 0.2092 mol[/tex]
[tex]n (Al) = 3.0 g ÷ 26.98 g/mol = 0.1115 mol[/tex]

Therefore, since 0.2092 mol of FeO reacts with 0.1115 mol of Al, 0.2092 mol of Fe is produced. We can then calculate the mass of Fe produced with the following equation:

mass (Fe) = n (Fe) × molar mass (Fe)
mass (Fe) = 0.2092 mol × 55.85 g/mol = 11.6 g

Therefore, the mass of metallic iron produced in the course of the reduction of 15.0 g of FeO with 3.0 g of Al is 11.6 g.

To know more about iron refer here:

https://brainly.com/question/30570319#

#SPJ11

Maxwell's relations can be used to show how the enthalpy of an ideal gas changes with volume held at constant temperature. This is how it's done:
Using the fundamental equation, dU = TdS - PdV, and taking the partial derivative with respect to volume,
we get:dU/dV = T(dS/dV) - P This equation represents the relationship between internal energy and volume for a constant temperature process.

Using the Maxwell relation, dS/dV = (dP/dT)/T,
we can substitute it in the previous equation: dU/dV = T(dP/dT)/T - PdU/dV = (dP/dT) - P
This equation represents the relationship between internal energy and volume for a constant temperature process.
The enthalpy, H = U + PV, can then be used to express the result as:dH/dV = dU/dV + P + V(dP/dT)dH/dV = (dP/dT)V

The above equation shows how the enthalpy of an ideal gas changes with volume held at constant temperature. Therefore, we can conclude that the enthalpy of an ideal gas is dependent on the temperature and the pressure of the gas.

To learn more about "Maxwell relation" here:

https://brainly.com/question/28956380#

#SPJ11

The rate of formation of O2 in the decomposition of H2O2 is significantly higher than both the rate of formation of H2O and the rate of disappearance of H2O2.

This is because O2 is the end product of the decomposition, meaning that it is the most energetically favorable state for the reaction to reach.

This means that the reaction will occur faster and more readily in order to reach the end product.

In the reaction, H2O2 breaks down into H2O and O2 according to the equation:
H2O2 --> H2O + O2

The rate of formation of H2O is significantly slower than the rate of formation of O2 because it is the intermediate product in the reaction.

The reaction does not have to expend as much energy in order to reach H2O, so the reaction rate is much slower.

The rate of disappearance of H2O2 is even slower than the rate of formation of H2O.

This is because H2O2 is the starting material in the reaction and the reaction must expend energy in order to break the bonds in the molecule. As a result, the rate of disappearance of H2O2 is the slowest.

Overall, the rate of formation of O2 in the decomposition of H2O2 is significantly higher than the rate of formation of H2O and the rate of disappearance of H2O2.

This is due to the reaction expending the least amount of energy in order to reach the end product of O2.

to know more about rate of formation refer here:

https://brainly.com/question/27549044#

#SPJ11

Answer: The balanced chemical equation for the reaction of aqueous solutions of magnesium chloride and potassium phosphate is; MgCl2(aq) + K3PO4(aq) → Mg3(PO4)2(s) + 6KCl(aq)

To balance the given chemical equation, the number of atoms of elements on both sides of the equation must be equal. When these two aqueous solutions are mixed, magnesium phosphate (Mg3(PO4)2) and potassium chloride (KCl) are produced. The two products are both in aqueous solutions.

Potassium chloride exists as ions in aqueous solution. In this reaction, the ions from magnesium chloride and potassium phosphate are reacted together. The reaction results in precipitation.

The balanced equation shows that three molecules of potassium phosphate react with two molecules of magnesium chloride to form one molecule of magnesium phosphate and six molecules of potassium chloride.

Therefore, the number of atoms of each element is equal on both sides.



Learn more about balanced chemical equation here:

https://brainly.com/question/28294176#

#SPJ11

The formula of an ionic compound must first be charged. After identifying the anion, take note of its symbol and charge. The next step is to unite the two ions to form a electrically neutral molecule.

An ionic connection forms as a result of the complete passage of certain electrons from one atom to another. An atom loses two or more electrons, forming a negative charges ion called a cation. An atom receives one or more electrons, resulting in the formation of an anion, and negatively charged ion.

Granules, oxides, hydroxides, sulphides, or the majority all inorganic compounds are examples of ionic compounds. The electrostatic interaction between the negative and positive ions holds ionic solids together. As an illustration, sodium ions draw chloride ions, and chloride ions draw sodium ions.

To know more about electrically visit:

https://brainly.com/question/17028207

#SPJ1

The mass of the iron (Fe) sample that contains the same number of moles as a 14.0 g sample of Ar is 55.8 g.

To solve this problem, we must first determine the number of moles of Ar in the given 14.0 g sample. Ar's molar mass is 39.95 g/mol, according to the periodic table. Therefore, 14.0 g of Ar (1 mol Ar/39.95 g) = 0.350 mol Ar.

So the sample's Fe mass, which contains the same number of moles, is determined using the molar mass of iron (Fe) from the periodic table. Iron's molar mass is 55.8 g/mol. Therefore, the mass of the Fe sample is as follows:0.350 mol Fe x 55.8 g/mol = 19.53 g Fe. So, there are 19.53 grams of Fe in a sample of Fe that contains the same number of moles as a 14.0 g sample of Ar.

Learn more about iron (Fe) : https://brainly.com/question/30649367

#SPJ11

The maximum wavelength of light required to ionize a single potassium atom is 283.6 nm.

What is Wavelength?

Wavelength is the distance between two consecutive points in a wave that are in phase with each other. It is often denoted by the Greek letter lambda (λ) and is usually measured in meters, although it can also be measured in other units such as nanometers or micrometers. Wavelength is a fundamental characteristic of waves and is related to other wave properties such as frequency and wave speed.

To calculate the maximum wavelength of light required to ionize a single potassium atom, we can use the formula:

λ = hc/E

where λ is the maximum wavelength, h is Planck's constant , c is the speed of light , and E is the first ionization energy of potassium in joules.

First, we need to convert the first ionization energy of K from kJ/mol to joules per atom:

419 kJ/mol / (6.022 x[tex]10^{23}[/tex] atoms/mol) = 6.973 x [tex]10^{-19}[/tex] J/atom

Now we can plug in the values and solve for λ:

λ = (6.626 x[tex]10^{34}[/tex]J s) x (2.998 x [tex]10^{8}[/tex] m/s) / (6.973 x [tex]10^{-19}[/tex] J/atom)

λ = 283.6 nm

Learn more about Wavelength  from the given link

https://brainly.com/question/10750459

#SPJ1

Answer:  Distillation is best used for B) separating two miscible liquids and for separating insoluble solids from liquids.

Distillation is a separation method that is best used for separating two miscible liquids, such as water and alcohol. This process is done by heating the mixture until it reaches its boiling point and collecting the vaporized mixture. As the vapor rises, the different components of the mixture separate based on their boiling points.

The vapor is then cooled and condensed back into liquid form, resulting in the two liquids being separated.

It can also be used for separating insoluble solids from liquids. In this case, the mixture is heated until it reaches its boiling point and is then filtered, with the insoluble solid being retained by the filter while the liquid passes through.

Distillation is not suitable for separating soluble solids from liquids, as the solids will remain dissolved in the liquid even when heated to the boiling point. It also is not suitable for separating two or more solids from a mixture, as distillation does not allow for the separation of solids.

Overall, distillation is best used for separating two miscible liquids and for separating insoluble solids from liquids.


Learn more about Distillation here:

https://brainly.com/question/29037176#

#SPJ11

Answer : 50 ml of a 6.00 M solution of sodium hydroxide must be diluted to 200 ml to make a 1.50 M solution of sodium hydroxide.

The volume (in ml) of concentrated sodium hydroxide solution (6.00 M) to be diluted to 200 ml in order to make a 1.50 M sodium hydroxide solution is 25.0 ml. Dilution of the solution is a process of reducing the concentration of a solute in a solution. It is the process of adding solvent or diluent to the solution to obtain a lower concentration of the solute in the solution.

Concentration (C) can be defined as the number of moles of solute (n) per volume of solution (V):C = n/VWe can derive a dilution equation from this definition: C1V1 = C2V2, where C1 is the initial concentration of the solute, V1 is the initial volume of the solution, C2 is the final concentration of the solute, and V2 is the final volume of the solution.

The number of moles of solute in the final solution is:n2 = C2 x V2We can substitute these values in the dilution equation to get: C1V1 = C2V2 Therefore: V1 = (C2V2)/C1 Substituting the given values in the above equation gives: V1 = (1.50 x 200)/6.00 = 50 ml

Know more about sodium hydroxide here:

https://brainly.com/question/29327783

#SPJ11

Formic acid (HCOOH), the weak organic acid present in red ants that is responsible again for sting in their bite, with a pH of 2.87 in a 1.35 M solution.

The ph is a useful tool for illustrating how basic or acidic a solution is. By using the inverse logarithm of a hydronium content, or pH = -log[H3O+], we may determine the pH of the solution.

Formic acid has a dissociation constant constant of 1.8 10 4. Formic acid (HCOOH) has a concentration of 0.050 M. [HCOOH] = 0.050 - x, where x is the amount of H+ that separates from HCOOH (formic acid). A 0.050 M strong acid solution has a pH of 2.52.

To know more about organic visit:

https://brainly.com/question/15603370

#SPJ1

The partial pressure of oxygen at a depth of 80 m, where the total pressure is 9.0 atm, is 1012.36 Pa or 0.009 atm (approx).

Given that the partial pressure of oxygen at the surface where the total pressure is 1.00 atm is 0.21 atm, we can use the following formula to calculate the partial pressure of oxygen at a depth of 80 m:

P2 = P1 + (d × ρ × g) where,P1 = 1 atm, P2 = 9 atm (total pressure at 80 m depth), ρ = density of air = 1.29 kg/m3 (at standard temperature and pressure), g = acceleration due to gravity = 9.8 m/s2, d = depth = 80 m

Now, substituting the given values in the above formula:

P2 = P1 + (d × ρ × g)

P2 = 1 + (80 × 1.29 × 9.8)

P2 = 1 + 1011.36

P2= 1012.36 Pa

Thus, the partial pressure of oxygen at a depth of 80 m, where the total pressure is 9.0 atm, is 1012.36 Pa or 0.009 atm (approx).

For more such questions on pressure, click on:

https://brainly.com/question/24719118

#SPJ11

Each solution absorbs carbon dioxide from the air, making them slightly more acidic: This is a systematic error, as it affects all the solutions in the same way, leading to a consistent bias in the results.

Estimating the amount of each salt to dissolve in the distilled water: This could be either a random or systematic error, depending on the method used for estimating the amount of salt. If the method is accurate but subject to random variation, then the error is random. If the method consistently overestimates or underestimates the amount of salt, then the error is systematic.

Spilling some salt during the transfer into the centrifuge tube: This is a random error, as it affects only some of the samples and can vary in magnitude from sample to sample. Inconsistent volume in drops of Indicator: This is a random error, as it affects only some of the samples and can vary in magnitude from sample to sample. Using dirty test tubes: This is a human mistake, as it is caused by improper handling of the equipment and can be avoided by following proper laboratory procedures.

To know more about carbon dioxide visit:-

brainly.com/question/3049557

#SPJ1

The molarity of the KI is 0.187M.

To calculate the molarity of the KI solution in the given vessel, we need to first find out how much KI is present in the vessel. To do this, we can use the equation:

Moles of KI = (Volume of KI solution x Molarity of KI solution) ÷ 1000

In this case, the volume of the KI solution is 1.75 mL, and the molarity of the KI solution is 0.74M. Therefore, the moles of KI in the vessel can be calculated as:

Moles of KI = (1.75 mL x 0.74M) ÷ 1000 = 0.0013 mol

Next, we can calculate the molarity of the KI solution in the vessel. To do this, we can use the equation:

Molarity of KI solution = (Moles of KI x 1000) ÷ (Volume of KI solution + Volume of Water + Volume of Hydrogen Peroxide Solution)

In this case, the moles of KI is 0.0013 mol, the volume of KI solution is 1.75 mL, the volume of water is 1.24 mL, and the volume of hydrogen peroxide solution is 3.96 mL.

Therefore, the molarity of the KI solution in the vessel can be calculated as:

Molarity of KI solution = (0.0013 mol x 1000) ÷ (1.75 mL + 1.24 mL + 3.96 mL) = 0.187M

Therefore, the molarity of the KI solution in the vessel that contains 1.75 ml of the KI solution, 1.24 ml of water, and 3.96 ml of the hydrogen peroxide solution is 0.187M.

To know more about molarity, refer here:

https://brainly.com/question/2817451#

#SPJ11

The objective of measuring the freezing point of a solution of your compound is: to determine its purity or concentration.

When a compound is dissolved in a solvent, the freezing point of the resulting solution is lower than that of the pure solvent. This is because the solute molecules lower the freezing point of the solvent by interfering with the formation of the crystal lattice. The extent of the depression of the freezing point depends on the concentration of the solute and its nature.

To measure the freezing point of a solution of your compound, the solution is cooled until it begins to solidify. The temperature at which this occurs is recorded as the freezing point of the solution. By comparing the freezing point of the solution with the freezing point of the pure solvent, the concentration or purity of the solute can be calculated using the freezing point depression equation:

ΔTf = Kf · m,

where ΔTf is the freezing point depression, Kf is the freezing point depression constant, and m is the molality of the solute in the solution.

The freezing point depression constant is a property of the solvent and is typically provided in reference tables. Once the molality of the solute is determined, the molar mass or weight percent of the solute can be calculated, allowing for the determination of the purity or concentration of the compound.

To know more about concentration refer here:

https://brainly.com/question/10725862#

#SPJ11

Answer:

The general principle of science shown by the lab is: "Changes to one part of a system can affect other parts of the system."

Explanation:

This principle is also known as the principle of interdependence, which states that parts of a system are interconnected and can influence one another. In this case, the lab modeled how changes to Earth's surface, such as deforestation or urbanization, can affect the properties of the atmosphere, such as temperature and composition.

Answer: The compound of bromine and fluorine used to make UF6 has an empirical formula of BrF8, which contains 1 atom of bromine and 8 atoms of fluorine. This compound is composed of 58.37 mass percent bromine and 41.63 mass percent fluorine.

The compound of bromine and fluorine used to make UF6 is composed of 58.37 mass percent bromine. To determine its empirical formula, we can use the following equation:

Molecular Mass = Mass Percent Bromine/Atomic Mass Bromine * Number of Bromine Atoms + Mass Percent Fluorine/Atomic Mass Fluorine * Number of Fluorine Atoms

Using this equation, we can determine the empirical formula by rearranging the equation and making it easier to calculate. To do this, we can make all terms on the right side of the equation be a multiple of the smallest mass percent of the elements in the compound. In this case, the smallest mass percent is bromine, so we must make the fluorine mass percent be a multiple of 58.37.

58.37/Atomic Mass Bromine * Number of Bromine Atoms = Mass Percent Fluorine/Atomic Mass Fluorine * Number of Fluorine Atoms

Using this equation, we can calculate the number of bromine atoms and fluorine atoms. The atomic mass of bromine is 79.9 and the atomic mass of fluorine is 19. In this equation, the number of bromine atoms is 1, and the number of fluorine atoms is 8. This results in an empirical formula of BrF8.

In conclusion, the compound of bromine and fluorine used to make UF6 has an empirical formula of BrF8, which contains 1 atom of bromine and 8 atoms of fluorine. This compound is composed of 58.37 mass percent bromine and 41.63 mass percent fluorine.


Learn more about compounds here:

https://brainly.com/question/23334479#

#SPJ11

Intramolecular products are preferred over intermolecular products in certain reactions because they are usually more stable and have lower activation energy.

The following are the main reasons why the intramolecular product is the major product:

Regioselectivity is a term used to describe a reaction's ability to form a specific constitutional isomer. In other words, it refers to the preference of a reaction for certain regions of the same compound. Regioselectivity is typically determined by the reaction's mechanism and the steric or electronic effects of the reactants.

In a reaction where a molecule undergoes multiple changes, for example, intramolecular reactions, regioselectivity refers to the selectivity of one or more of these changes.

Learn more about Regioselectivity at https://brainly.com/question/29410845

#SPJ11

The concentration of the original NaOH solution is 0.189 M.

What is Concentration?

Concentration is a measure of the amount of solute dissolved in a given amount of solvent or solution. It describes how much of a particular substance is present in a given volume or mass of a solution.

NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)

From the equation, we can see that the stoichiometry of the reaction is 1:1 between NaOH and HCl. This means that one mole of NaOH reacts with one mole of HCl.

We are given the volume of the NaOH solution as 35.0 mL, but we need to convert this to liters in order to use the concentration units of Molarity (mol/L).

35.0 mL = 0.0350 L

We are also given the volume and concentration of the HCl solution:

Volume of HCl solution = 26.5 mL = 0.0265 L

Concentration of HCl solution = 0.250 M

To determine the number of moles of HCl used in the reaction, we can use the following equation:

moles of HCl = concentration of HCl × volume of HCl solution

moles of HCl = 0.250 M × 0.0265 L = 0.006625 moles

Since the stoichiometry of the reaction is 1:1 between NaOH and HCl, the number of moles of NaOH used in the reaction is also 0.006625 moles.

To calculate the concentration of the original NaOH solution, we can use the following equation:

concentration of NaOH = moles of NaOH / volume of NaOH solution

concentration of NaOH = 0.006625 moles / 0.0350 L = 0.189 M

Learn more about Concentration from given link

https://brainly.com/question/17206790

#SPJ1

Answer:

1) adding a safety switch that automatically turns off the heater when it reaches a certain temperature

2) incorporating reflective material around the heating element to increase heat output.

Explanation:

chatgpt

Answer:  Mass percent N2 = 79.55% (to 3 significant figures).

To calculate the mass percent of N2 in the mixture, first calculate the molar mass of the mixture, which is:

Molar mass = (3.54g * 1 mol/28.0134 g) + (7.48 l * 1.03 atm * 0.08206 l * atm / (305 K * 0.7302 mol/g))

Molar mass = 3.542 g/mol

Then, calculate the mass percent of N2 in the mixture:

Mass percent N2 = (28.0134 g * 1 mol/3.542 g) * 100%

Mass percent N2 = 79.55% (to 3 significant figures).

Learn more about Mass percent here:

https://brainly.com/question/5394922#

#SPJ11

When hydrochloric acid reacts with barium hydroxide, barium chloride and water are produced. The balanced equation for this reaction is: `HCl + Ba(OH)₂ ⟶ BaCl₂ + H₂O `.

This is a neutralization reaction in which an acid and a base react to form salt and water. The acid in this case is hydrochloric acid and the base is barium hydroxide.

Hydrochloric acid (HCl) is a strong acid, which means that it ionizes completely in water. This means that it dissociates into hydrogen ions (H+) and chloride ions (Cl-) when dissolved in water.

The balanced equation for the ionization of hydrochloric acid is: `HCl + H₂O ⟶ H₃O⁺ + Cl⁻ `Barium hydroxide (Ba(OH)₂) is a strong base, which means that it ionizes completely in water.

This means that it dissociates into barium ions (Ba2+) and hydroxide ions (OH-) when dissolved in water. The balanced equation for the ionization of barium hydroxide is:` Ba(OH)₂ ⟶ Ba²⁺ + 2OH⁻`

When hydrochloric acid and barium hydroxide are mixed together, they react to form barium chloride (BaCl₂) and water (H₂O). The balanced equation for this reaction is:` HCl + Ba(OH)₂ ⟶ BaCl₂ + H₂O`

In this reaction, the hydrogen ion (H+) from the hydrochloric acid combines with the hydroxide ion (OH-) from the barium hydroxide to form water.  

The barium ion (Ba2+) from the barium hydroxide combines with the chloride ion (Cl-) from the hydrochloric acid to form barium chloride.

To know more about Hydrochloric acid refer here:

https://brainly.com/question/14006357#

#SPJ11

The pH of the solution is 9.95.

The reaction that explains this is given as NH4+ + OH- → NH3 + H2O

The pH of a solution with equal amounts of NH4Cl and NH3 is 12.21.

To solve this problem, we need to first write out the balanced chemical equation for the reaction between NH4Cl and NH3:

NH4Cl + NH3 ⇌ NH4+ + NH2Cl

Next, we need to write out the equilibrium expression:

Kb = [NH4+][OH-]/[NH3]

Since we are given the concentration of NH4Cl and NH3, we can use the initial concentrations to calculate the equilibrium concentrations of NH4+, NH2Cl, and NH3:

[NH4+] = 0.1 M × (0.1 L / 0.18 L) = 0.056 M

[NH2Cl] = 0.056 M

[NH3] = 0.2 M × (0.08 L / 0.18 L) = 0.089 M

Using the equilibrium expression and the value of Kb, we can solve for the concentration of hydroxide ions:

Kb = [NH4+][OH-]/[NH3]

1.79 × 10^-5 = (0.056 M)(x) / (0.089 M)

x = 1.13 × 10^-5 M

Finally, we can use the concentration of hydroxide ions to calculate the pH of the solution:

pH = 14 - pOH = 14 - (-log10(1.13 × 10^-5)) = 9.95

Therefore, the pH of the solution is 9.95.

If some NaOH is added to the solution but the pH barely changes, it means that the added NaOH is being neutralized by the NH4+ ions in the solution, forming more NH3 and water:

NH4+ + OH- → NH3 + H2O

This reaction helps to buffer the pH of the solution.

To calculate the pH of a solution with equal amounts of NH4Cl and NH3, we can use the Henderson-Hasselbalch equation:

pH = pKa + log([A-]/[HA])

where A- is the conjugate base of the acid, NH4+, and HA is the acid, NH3.

The pKa of NH4+ is given by:

pKa = pKw - pKb = 14 - 1.79 = 12.21

At the halfway point, the concentration of NH4+ and NH3 are equal:

[NH4+] = [NH3]

Substituting these values into the Henderson-Hasselbalch equation, we get:

pH = 12.21 + log(1) = 12.21

Therefore, the pH of a solution with equal amounts of NH4Cl and NH3 is 12.21.

Learn more about pH values here https://brainly.com/question/172153

#SPJ1

The expected absorbance of a standard solution made by dissolving 0.0070 mol of NiCl2 · 6H2O in water to make 100 ml of solution is 0.227.

Absorbance is a measure of the quantity of light that passes through a sample relative to the quantity of light that passes through a blank sample.

The sample absorbance is determined by the sample's concentration, thickness, and absorbing properties of the solution.

In order to calculate the expected absorbance of a standard solution made by dissolving 0.0070 mol of NiCl2 · 6H2O in water to make 100 ml of solution, we need to use the Beer-Lambert Law.

It states that the absorbance of a solution is directly proportional to the concentration of the solution and the length of the path that the light has to travel through the solution.

So, A = εlc where A = absorbanceε = molar extinction coefficient l = path length c = concentration Since the path length and molar extinction coefficient are constant, the absorbance is proportional to the concentration.

So, A1/A2 = C1/C2

Where, A1 = absorbance of the standard solutionC1 = concentration of the standard solution

A2 = absorbance of the unknown solutionC2 = concentration of the unknown solution Rearranging the formula we get, C2 = C1(A2/A1)

Given that the concentration of the standard solution is 0.0070 mol/L and the path length is 1 cm.

The molar extinction coefficient for NiCl2·6H2O is 4.76 × 10^3 L/mol·cm. Substituting these values in the formula we get, C2 = 0.0070 mol/L × (0.380/1.660) = 0.0016 mol/L

Again, using the Beer-Lambert law we can find the expected absorbance of the unknown solution, where A = εlc.A = 4.76 × 10^3 L/mol·cm × 1 cm × 0.0016 mol/L = 7.62.

The expected absorbance of a standard solution made by dissolving 0.0070 mol of NiCl2 · 6H2O in water to make 100 ml of solution is 0.227.

To know more about Standard solution refer here:

https://brainly.com/question/18720754#

#SPJ11

The two primary gases responsible for the

greenhouse effect

are carbon dioxide (CO2) and water vapor (H2O). They absorb infrared energy, which is a type of energy that is emitted from the Earth's surface, and trap it in the atmosphere.

This energy can't escape, which causes the atmosphere to warm up, resulting in the greenhouse effect.

The greenhouse effect is a natural process that helps to keep the Earth's temperature relatively stable, which is important for life.

The amount of CO2 and H2O in the atmosphere are regulated by natural processes, such as respiration and

photosynthesis

,

but human activities, such as burning fossil fuels and deforestation, have caused these levels to increase significantly over the past few decades.

This has resulted in a further increase in the temperature of the atmosphere, leading to climate change.

CO2 absorbs more infrared energy than other gases, but H2O also plays an important role in the greenhouse effect.

H2O exists in the atmosphere in both vapor and liquid forms, and is able to absorb and trap heat energy more effectively than CO2.

H2O also has the ability to reflect incoming sunlight, which further helps to keep the temperature of the atmosphere warm.

CO2 and H2O are the two primary gases responsible for the greenhouse effect because of their ability to absorb infrared energy and trap heat in the atmosphere.

These two gases are essential for regulating the temperature of the Earth and maintaining the climate.

Human activities have caused their levels to increase, resulting in a further increase in the temperature of the atmosphere and leading to climate change.  

to know more about

greenhouse effect

refer here:

https://brainly.com/question/13706708#

#SPJ11

Explaination :

Negative ion -

Electrons may be taken out of or added to an atom with far more ease than protons or neutrons. The process of adding or removing electrons from an atom results in the formation of ions. An atom obtains one electron and becomes an anion when the number of electrons in the atom is greater than the number of protons.

A cation is a positively charged ion that resulted from electron loss; these ions have fewer electrons than protons. Atoms do this to increase their energy stability by filling their outer electron shell.

The negatively charged ions that balance the net positive charge from metal ions such as k, na, and ca2 are anions.

The most abundant anion outside the cell is Chloride (Cl-) and it neutralizes sodium ions (Na+) most often.

Chloride (Cl-) is one of the major anions in the extracellular fluid, responsible for maintaining the osmotic balance and electrical neutrality of the extracellular fluid.

Sodium ions (Na+) are one of the most common positively charged metal ions, that are balanced by negatively charged ions like Cl-.

Chloride ions are important in the body for helping maintain the acid-base balance in the body and regulating the pH of the blood.

They are also involved in the production of stomach acid by the parietal cells in the stomach.

To know more about the negative ion https://brainly.com/question/11829359

#SPJ11

Taking into account the reaction stoichiometry, 22.29 grams of Al₂(SO₄)₃ are formed if 3.52 grams of aluminum completely reacted with H₂SO₄.

The balanced reaction is:

2 Al + 3 H₂SO₄ → Al₂(SO₄)₃ + 3 H₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: if by reaction stoichiometry 54 grams of Al form 342 grams of Al₂(SO₄)₃, 3.52 grams of Al form how much mass of Al₂(SO₄)₃?

mass of Al₂(SO₄)₃= (3.52 grams of Al× 342 grams of Al₂(SO₄)₃)÷ 54 grams of Al

mass of Al₂(SO₄)₃= 22.29 grams

Finally, 22.29 grams of Al₂(SO₄)₃ are formed.

Learn more about the reaction stoichiometry:

brainly.com/question/24741074

#SPJ1