Answer: The smallest whole-number ratio of the atoms in a compound represents the molar ratio of the elements in which they are combined. For example, Water is a compound. The chemical formula of water is H2O H 2 O . In water, H and O elements are combined in the molar ratio of 2:1.Explanation:
Answer:
[tex]emperical \: formula[/tex]
How many moles of MgS are in 1.00g MgS?
Answer:
24.31 g/mol.
Explanation:
moles =mass/molar mass
n=w/m
On a distance time graph of an objects motion distance is usually what
What physical property of matter can be measured using the triple beam balance?
A
volume
B
mass
C
height
D
length
SUBMIT ANSWER
Answer:
B) Mass- I searched it up
What happens to the solubility of gases in water as pressure increases?
Question 9 options:
solubility increases so less solute dissolves
solubility decreases so more solute dissolves
solubility increases so more solute dissolves
solubility decreases so less solute dissolves
Answer: Solubility increases so more solute dissolves
Explanation:
The solubility is a measure of the concentration of the dissolved gas particles in the liquid and is a function of the gas pressure. As you increase the pressure of a gas, the collision frequency increases and thus the solubility goes up, as you decrease the pressure, the solubility goes down.
need quick will give 40 points
Answer:
3 moles H2 x (molecules / 1 mol H2)
Explanation:
3 moles H2 x (molecules / 1 mol H2)
I don’t get this at allll
The volume of the nitrogen oxide gas is 35.2 L
How do you apply stoichiometry?Stoichiometry is the quantitative study of reactants and products in a chemical reaction. It is used to determine the amount of reactants needed to produce a certain amount of product, or to determine the amount of product that will be produced from a given amount of reactant.
To apply stoichiometry;
We know that;
Number of moles of Cu = 150/ 63.5g/mol = 2.36 moles
If 3 moles of Cu produced 2 moles of NO
2.36 moles of Cu will produce 2.36 * 2/3
= 1.57 moles
If 1 moles of NO occupies 22.4 L
1.57 moles of NO will occupy 1.57 * 22.4/1
= 35.2 L
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If a student had 28 moles of solid carbon would that be enough to produce 15 moles of C2H6
No, 28 moles of solid carbon would not be enough to produce 15 moles of [tex]C_2H_6[/tex] (Ethane).
This is because the reaction requires more than 1 mole of carbon to produce 1 mole of [tex]C_2H_6[/tex]. The mole ratio of [tex]C_2H_6[/tex]:C is 2:1, so 28 moles of carbon would only be enough to produce 14 moles of [tex]C_2H_6[/tex].A chemical compound having the molecular formula [tex]C_2H_6[/tex], ethane is an organic substance. Ethane is an odourless, colourless gas at ordinary pressure and temperature. Ethane is separated from natural gas on an industrial scale, and it is produced as a by-product of the petrochemical process used to refine crude oil. Its primary usage is as a feedstock for the creation of ethylene.The ethane moiety is known as an ethyl group, and it can be used to create related compounds by swapping out a hydrogen atom for another functional group.
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What does conserving mass mean in a chemical equation? Responses There is equal number of each type of atom on the reactant and product side. There is equal number of each type of atom on the reactant and product side. There are more of each type of atom on the product side than on the reactant side. There are more of each type of atom on the reactant side than on the product side. There is an unequal number of each type of atom on both sides of the equation.
Zinc reacts with hydrochloric acid according to the reaction equation
Zn(s) + 2 HCl(aq) → ZnCl₂(aq) + H₂(g)
How many milliliters of 1.50 M HCl(aq) are required to react with 5.05 g Zn(s)?
volume: ___ mL
Answer:
many milliliters of 1.50 M HCl(aq) are required to react with 5.05 g Zn(s)?
volume: 16 mL
First, we need to calculate the number of moles of Zn:
m(Zn) = 5.05 g
M(Zn) = 65.38 g/mol (molar mass of Zn)
n(Zn) = m(Zn) / M(Zn) = 5.05 g / 65.38 g/mol = 0.0773 mol
According to the balanced chemical equation, 1 mole of Zn reacts with 2 moles of HCl. Therefore, the number of moles of HCl needed is:
n(HCl) = 2 × n(Zn) = 2 × 0.0773 mol = 0.1546 mol
Now we can use the molarity of the HCl solution to calculate the volume needed:
M(HCl) = 1.50 mol/L
n(HCl) = V(HCl) × M(HCl)
V(HCl) = n(HCl) / M(HCl) = 0.1546 mol / 1.50 mol/L = 0.103 L = 103 mL
Therefore, we need 103 mL of 1.50 M HCl(aq) to react with 5.05 g Zn(s).
What type of spectrum does this represent?
A. Absorption Spectrum
B. Continuous Spectrum
C. Emission Spectrum
Answer:
Continuous Spectrum, a spectrum that contains all wavelengths of light within a specific range, with no gaps or lines. It is produced by a hot, dense object such as a star or a light bulb.
Emission Spectrum, a spectrum that contains bright lines or bands of specific wavelengths, with dark spaces in between. It is produced when light is emitted from a hot gas or plasma, and the specific wavelengths of the lines or bands depend on the elements present in the gas.
Absorption Spectrum, a spectrum that contains dark lines or bands of specific wavelengths, with bright spaces in between. It is produced when a continuous spectrum passes through a cool gas, and the specific wavelengths of the lines or bands depend on the elements present in the gas.
When a protonated epoxide is attacked by water, the nucleophile attacks from the ___________ in an __________ process.
When a protonated epoxide is attacked by water, the nucleophile attacks from the "top" or "front" of the epoxide ring in an "S_N2" substitution nucleophilic bimolecular process.
What is protonated epoxide ?
A protonated epoxide is a molecule that contains an epoxide ring (a three-membered ring consisting of two carbon atoms and one oxygen atom) that has been protonated, or had a hydrogen ion (H+) added to it.
The protonation of an epoxide ring can occur in the presence of an acidic medium, such as a strong acid like sulfuric acid (H2SO4) or hydrochloric acid (HCl).
In acidic conditions, the lone pair of electrons on the oxygen atom of the epoxide ring can interact with the positively charged hydrogen ion, resulting in the formation of a protonated epoxide.
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What must the atoms of products equal in a chemical equation?
O atoms in molecules
O electrons in atoms
O protons in atoms
O atoms of reactants
20pts
Answer:
D
Explanation:
calculate the mole fraction of HCl in a 9.8% (by mass) aqueous solution. the density of the solution is 1.03 g/mL
The mole fraction of HCl in the given solution is 0.051.
What is the mole fraction of the HCL?To calculate the mole fraction of HCl in the given solution, we need to first find the mass of HCl and water present in the solution.
Let's assume we have 100 g of the solution, so 9.8 g of it is HCl, and 90.2 g is water.
Next, we need to find the moles of HCl present in the solution.
To do this, we divide the mass of HCl by its molar mass.
The molar mass of HCl is 36.46 g/mol (1.01 g/mol for hydrogen + 35.45 g/mol for chlorine).
moles of HCl = 9.8 g / 36.46 g/mol = 0.269 mol
The moles of water can be calculated using its molar mass which is 18.015 g/mol.
moles of water = 90.2 g / 18.015 g/mol = 5.005 mol
The total number of moles in the solution is the sum of the moles of HCl and water.
total moles = 0.269 mol + 5.005 mol = 5.274 mol
The mole fraction of HCl can now be calculated by dividing the moles of HCl by the total number of moles.
mole fraction of HCl = 0.269 mol / 5.274 mol = 0.051
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Please help :) almost due
The substance is lithium (Li).
Lithium has an atomic number of 3, which corresponds to the number of protons in its nucleus.The atomic masses or mass numbers of the three isotopes of lithium are 6, 7, and 8, respectively. This indicates that the number of neutrons in the nuclei of these isotopes varies.The three isotopes of lithium, 6 Li, 7 Li, and 8 Li, all have three protons in common, but have varying numbers of neutrons in their nuclei, resulting in distinct atomic weights.Isotopes
Isotopes are atoms of the same element with variable numbers of neutrons but the same number of protons in their nucleus.
Hence, although having different atomic masses, they have the same atomic number.
The physical characteristics of an element's isotopes can differ from their chemical characteristics because of their varied atomic masses.
Isotopes include, for instance:
Carbon: There are three isotopes of carbon: carbon-12, carbon-13, and carbon-14. While Carbon-14 is a radioactive isotope, Carbon-12 and Carbon-13 are stable isotopes.There are three isotopes of hydrogen: hydrogen-1 (also known as protium), hydrogen-2 (sometimes known as deuterium), and hydrogen-3 (also known as tritium). Tritium is a radioactive isotope, whereas protium and deuterium are stable isotopes.Three oxygen isotopes are oxygen-16, oxygen-17, and oxygen-18. The most prevalent isotope is oxygen-16.learn more about isotopes here
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what is the answers to this someone pls help
Answer:
The nuclide formed by the β decay of 26Al is 26Mg.
Mark my answer as brainliest! this was a difficult one
How many liters of a 3.58 MK2SO4 solution are needed to provide 85.1 g of K2SO4 (molar mass 174.01g/mol)? Recall that M is equivalent to mol/L.
Explanation:
The pressure of compressed air that occupies 2 L is 30.0 atm. What will be the new volume of the gas if the pressure is reduced to 10.0 atm if the temperature is not allowed to change? Ty in advance!
Answer:
To solve this problem, we can use the Boyle's Law equation, which states that the pressure and volume of a gas are inversely proportional at constant temperature.
Boyle's Law: P1V1 = P2V2
where P1 and V1 are the initial pressure and volume, and P2 and V2 are the new pressure and volume.
Using the given values:
P1 = 30.0 atm
V1 = 2 L
P2 = 10.0 atm
Substituting these values into the Boyle's Law equation, we get:
30.0 atm x 2 L = 10.0 atm x V2
Simplifying and solving for V2, we get:
V2 = (30.0 atm x 2 L) / 10.0 atm
V2 = 6 L
Therefore, the new volume of the gas will be 6 L if the pressure is reduced to 10.0 atm, assuming the temperature remains constant.
I Hope This Helps!
How many mL of 2.25M H2SO4 are needed to react completely with 69.9g BaO2
Answer:
4 millllllermeeters jb
how many grams of Fe are produced from 92.5g of FeO given the following reaction
The mass(in grams) of iron, Fe produced from the 92.5g of iron (ii) oxide, FeO is 71.9 grams
How do i determine the mass of Fe produced?The mass of Fe produced from the 92.5g of iron (ii) oxide, FeO can be obtained as follow:
2FeO → 2Fe + O₂
Molar mass of FeO = 71.85 g/molMass of NH₃ from the balanced equation = 2 × 71.85 = 143.7 g Molar mass of Fe = 55.85 g/molMass of Fe from the balanced equation = 2 × 55.85 = 111.7 gFrom the balanced equation above,
143.7 g of FeO reacted to produce 111.7 g of Fe
Therefore,
92.5 g of Fe will react to produce = (92.5 × 111.7) / 143.7 = 71.9 g of Fe
Thus, the mass of Fe produced from the reaction is 71.9 grams
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Complete question:
How many grams of Fe are produced from 92.5 g of FeO given the following reaction 2FeO → 2Fe + O₂
L 4.4.2 Test (CST): Electricity and Energy Resources
Question 11 of 25
What happens to the field lines of two positive charges as the charges are
brought close together?
A. The field lines are attracted to the other charge.
B. The field lines cross together.
C. It would depend on what kind of positive charges they are.
D. The field lines bend away from the other charge.
SUBMIT
Answer:
D
Explanation:
because replusive force is much more
The volume of a gas is 200 mL at 350.0 kPa pressure. What will the volume be when the pressure is reduced to 125.0 kPa, assuming the temperature remains constant.
The volume of the gas will be 560 mL when the pressure is reduced to 125.0 kPa, assuming the temperature remains constant.
What will be the volume of the gas when the pressure is reduced to 125.0 kPa?Boyle's law simply states that "the volume of any given quantity of gas is inversely proportional to its pressure as long as temperature remains constant.
Boyle's law is expressed as;
P₁V₁ = P₂V₂
Where P₁ is Initial Pressure, V₁ is Initial volume, P₂ is Final Pressure and V₂ is Final volume.
Substituting the given values, we get:
P₁ = 350.0 kPa (initial pressure)
V₁ = 200 mL (initial volume)
P₂ = 125.0 kPa (final pressure)
V₂ = ?
Solving for V₂, we get:
V₂ = ( P₁ × V₁ ) / P₂
V₂ = (350.0 kPa × 200 mL) / 125.0 kPa
V₂ = 560 mL
Therefore, the final volume of the gas is 560 mL.
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Imagine that humans achieve interstellar travel and are able to move from solar system to
solar system. What would change about the stars for these space travelers?
A: absolute magnitude
B:apparent magnitude
C:absorption spectrum
D:relative electromagnetism
Absolute magnitude, on the other hand, is a measure of how bright a star would appear if it were located at a standard distance of 10 parsecs (32.6 light-years) away from Earth.
What is Magnitude?
Magnitude is a measure of the brightness of a celestial object, such as a star, planet, or galaxy. It is based on the amount of light that is emitted by the object and is typically expressed using a numerical scale. The lower the magnitude value, the brighter the object appears.
Apparent magnitude is a measure of how bright an object appears to an observer on Earth, while absolute magnitude is a measure of how bright an object would appear if it were located at a standard distance of 10 parsecs (32.6 light-years) away from Earth.
Apparent magnitude is a measure of how bright a star appears to an observer on Earth. It is determined by the amount of light that reaches Earth from the star, as well as the distance between the star and Earth. As humans travel away from our solar system and to other solar systems, the distance between them and the stars will change, which will affect how bright the stars appear to the travelers. As they move closer to a star, its apparent magnitude will increase, and as they move away, its apparent magnitude will decrease.
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which statement describes density? Check all that apply
Density is a chemical property of an object.
The density of an object is constant.
Density is a derived unit of measure.
Density is the sum of the mass and volume of an object.
The density of an object determines whether it will sink or float.
Answer:
The density of an object is constant.
Density is a derived unit of measure.
The density of an object determines whether it will sink or float.
42 grams of nitrogen gas react with
13 grams of hydrogen gas. What is the
limiting reactant and how many grams of
ammonia will be produced?
N2 + 3H22NH3
A) H2; 74 grams NH3 produced
B) H2; 4.3 grams NH3 produced
C) N2; 3.0 grams NH3 produced
D) N2; 51 grams NH3 produced
Answer:
d
Explanation:
Nitrogen is the limiting reactant.
42 g N2x (1mole N2/28 g N2) X (2 moles NH3/ 1mole N2) X (17 grams NH3/1mole NH3) = 51 g
13 g H2 x (1 mole H2/2 g H2) X (2 moles NH3/3moles H2) X (17 g NH3/1mole NH3) =73.66g
since 51 is smaller than 73.66 and it started with N2 that is why N2 is the limiting reactant)
what percentage of air is oxygen?
Answer:
21% percent
Explanation:
Air has small amounts of other gases, such as carbon dioxide,neon, and hydrogen. Oxygen shares some parts of air basically. The highest percentage of oxygen we can breathe is approximately 60℅
When 25 mL of 1.0M H₂SO4 is added to 50 mL of 1.0 M NaOH at 25°C in a calorimeter,
the temperature of the aqueous solution increases to 33.9 °C. Assuming that the specific
heat of the solution is 4.18 J/g°C, that its density is 1.00/mL, and that the calorimeter
itself absorbs a negligible amount of heat, calculate the amount of heat absorbed for the
reaction.
Answer: The amount of heat absorbed for the reaction of 25 mL of 1.0 M H₂SO4 and 50 mL of 1.0 M NaOH, resulting in a temperature increase from 25°C to 33.9°C, is 10.14 kJ.
Explanation:
If He(g) has an average kinetic energy of 7450 J/mol
under certain conditions, what is the root mean square speed of F2(g) molecules under the same conditions?
Under the same conditions, the root mean square speed of F2(g) molecules is approximately 400 m/s.
Step by step explanationThe root mean square (rms) speed of a gas molecule can be calculated using the following equation:
rms speed = sqrt((3RT)/M)
where R is the gas constant, T is the temperature in Kelvin, and M is the molar mass of the gas molecule.
To use this equation to find the rms speed of F2(g) molecules, we need to know the temperature and molar mass of F2(g).
Let's assume that F2(g) is at the same temperature as He(g), and that the molar mass of F2(g) is 38.0 g/mol (the molar mass of F2).
Using the given average kinetic energy of He(g) and the molar mass of He(g) (4.00 g/mol), we can solve for the temperature:
(3/2)kT = average kinetic energy per mole
where k is the Boltzmann constant
(3/2)(1.38 x 10^-23 J/K)(T) = 7450 J/mol
T = 7450 J/mol / ((3/2)(1.38 x 10^-23 J/K)) = 346 K
Now we can use the rms speed equation to find the rms speed of F2(g):
rms speed = sqrt((3RT)/M) = sqrt((3 x 8.31 J/mol K x 346 K)/(38.0 g/mol))
rms speed = 400 m/s (rounded to three significant figures)
Therefore, under the same conditions, the root mean square speed of F2(g) molecules is approximately 400 m/s.
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What is the percent of O in
Ca(С2H302)2?
(Ca = 40.08 g/mol, C = 12.01 g/mol,
H= 1.01 g/mol, O = 16.00 g/mol)
40.5%
Explanation:
Ca×1 = 40
C×4 = 48
H×6 = 6
O×4 = 64
64÷158×100% = 40.5%
Consider the reaction for the formation of aluminum oxide from aluminum and oxygen.
4Al(s)+3O2(g)⟶2Al2O3(s)Δ1
Express the enthalpy of the following reaction, Δ2,
in terms of Δ1.
2Al2O3(s)⟶4Al(s)+3O2(g)Δ2
Express the enthalpy of the following reaction, Δ3,
in terms of Δ1.
12Al(s)+9O2(g)⟶6Al2O3(s)Δ3
Express the enthalpy of the following reaction, Δ4,
in terms of Δ1.
2Al(s)+32O2(g)⟶Al2O3(s)Δ4
To solve for Δ2, we need to reverse the reaction and change the sign of Δ1:
2Al2O3(s)⟶4Al(s)+3O2(g)Δ2 = -Δ1
Therefore, Δ2 = -Δ1.
To solve for Δ3, we need to add the reactions for the formation of two moles of Al2O3 from aluminum and oxygen:
4Al(s)+3O2(g)⟶2Al2O3(s)Δ1
2Al2O3(s)⟶4Al(s)+3O2(g)Δ3
Adding these equations gives:
12Al(s)+9O2(g)⟶6Al2O3(s)Δ3
Therefore, Δ3 = 2Δ1.
To solve for Δ4, we need to divide the reaction for the formation of two moles of Al2O3 by two:
2Al(s)+3O2(g)⟶Al2O3(s)Δ1/2
Multiplying this equation by 16 gives:
32Al(s)+48O2(g)⟶16Al2O3(s)8Δ1/2
We can then cancel out the formation of 14 moles of Al2O3:
2Al(s)+32O2(g)⟶Al2O3(s)Δ4 = 8Δ1/2 - 7Δ1
Therefore, Δ4 = 8Δ1/2 - 7Δ1.
When limestone (which is principally CaCO3) is heated, carbon dioxide and quicklime (CaO) are produced by the reaction CaCO3(s) →∆ CaO(s) + CO2(g) . If 16.3 g of CO2 was produced from the ther- mal decomposition of 41.48 g of CaCO3, what is the percentage yield of the reaction?