The volatile is defined as the speed or rate at which a substance evaporates when exposed to the air.
The Volatility is indicated by the substance's vapor pressure. It is the tendency of the substance to the speed at which it vaporizes or evaporates. The Substances with the higher vapor pressure will be vaporize more easily at the given temperature than compared to the substances with the lower the vapor pressure.
Thus, the speed or rate at which a substance evaporates when exposed to the air is termed as the volatility. It is tendency of the substances to get vaporize.
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how many br- ions are present in 1.00 moles of febr3?
The chemical formula for ferric ion (Fe3+) is Fe(III) or Fe3+. To calculate the number of ions contained in a given quantity of a material, multiply the number of moles by FeBr3 Avogadro's number.
There would be 1.00 x Avogadro's number of Fe(III) ions in 1.00 mole of Fe(III) (FeBr3). The value of Avogadro's number is 6.022 x 1023 atoms or ions per mole. So there are roughly 6.022 x 1023 Fe(III) ions in 1.00 mole of FeBr3. Although commercially accessible at a low cost, FeBr3 may be made by treating iron metal with bromine:2 Fe+3 Br2 2 FeBr3 FeBr3 decomposes to ferrous bromide over 200 °C: 2FeBr3 + Br2 = 2FeBr2 + Br2 Because chlorine has a higher oxidizing activity, iron(III) chloride is much more stable. FeI3 is unstable because iron(III) oxidizes.For every mole of iron (III) bromide, which has the formula FeBr3 F e B r 3, three moles of bromide ions are present. The chemical compound with the formula FeBr3 is iron(III) bromide.
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two ways can scientists exhibit ethical behavior?
Answer:
1. Creating products that improve people's lives.
2. Remaining impartial about data while conducting experiments.
will a bond form if an atom of this element moves towards an atom having seven valence electrons? why or why not?
No, it would not be very probable to happen because the first element, neon, is already stable due to the fact that the outermost shell of its atom is completely filled.
An electron that is linked with an atom and that can take part in the development of a chemical bond is referred to as a valence electron. In the formation of a single covalent bond, each of the atoms in the bond contributes one valence electron in order to form a shared pair.
It is possible for the existence of valence electrons to determine the chemical characteristics of an element as well as whether or not it can form bonds with other elements. A valence electron can only exist in the most outer electron shell of an element that is part of the main group.
An atom that has its valence shell completely filled with electrons has a high probability of being chemically inert. A highly reactive atom is one that has one or two valence electrons in excess of what is required for a closed shell. This is because the additional valence electrons can be quickly stripped away to produce a positive ion.
An atom that has one or two valence electrons less than a closed shell is also extremely reactive. This is due to the fact that such an atom has a greater propensity to either gain the missing valence electrons or share valence electrons with neighboring atoms.
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I need a description of the rocks.
Table D. Absolute Age of Rock Layers
Basalt is an ingenious salt which is found near the surface. Limestone fossils are found in sedimentary sequences and they are old by 2.7 billion years. Sand stones with trilobites are old about 500 million years.
What are rock types?Rocks are the major parts of the tectonic plates of earth, There are broadly three classes of rocks namely, sedimentary rocks, igneous rocks and metamorphic rocks.
Basalt is a type of well grained igneous rocks found near the surface of earth. Rapid cooling of lava rich in Mg and Ca composes Basalt rock
Limestone, a form of carbonate sedimentary rock composed primarily of calcium carbonate (CaCO3). The minerals calcite and aragonite, which are various crystal forms of CaCO3, make up the majority of its material. When these minerals separate from water that has dissolved calcium, limestone is created.
Sileous sandstone is a typical component of nearshore deposits about 500-600 million years of age. This often grades into siltstone and shale as it moves into the sea, with finer-grained sediment accumulating in deeper water to create these rocks.
Shale rocks with ammonites have an age of about 70 million years. Ammonites are spiral shaped fossilized shells of marine animals.
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What's the structural formula of 4, 4 dimethyl pent-2-ene?
The structural formula of 4,4-dimethyl pent-2-ene is:
H3C-CH2-CH(CH3)-CH(CH3)-CH2-CH3.
This molecule contains a pent-2-ene chain which is composed of 5 carbon atoms and 2 double bonds with a methyl group (-CH3) attached to the 4th and 5th carbon atoms. The structural formula of 4,4-dimethylpent-2-ene represents the arrangement of atoms in the molecule using chemical symbols and bond lines.
The chemical symbol for carbon is "C" and for hydrogen is "H". In this structural formula, you can see that there are 5 carbon atoms (C) and 14 hydrogen atoms (H) in the molecule.
The line (-) represents a single bond, which is a covalent bond between two atoms. The double bond is represented by "=".
The molecule contains a pent-2-ene chain which is composed of 5 carbon atoms and 2 double bonds between the 2nd and 3rd and 4th and 5th carbon atoms. The molecule also contains two methyl groups (-CH3) attached to the 4th and 5th carbon atoms. A methyl group is a functional group that contains one carbon atom and three hydrogen atoms.
This structural formula is a way to represent the molecular structure of 4,4-dimethyl pent-2-ene in a simplified way.
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examples of soluble and insoluble salts
Explanation:
This is answer is given the following
Which prediction is supported by the information in the table? K will give up an electron more easily than Br. Both K and Br will have the same pull on electrons. K will have a smaller size in comparison to Br. Both K and Br will produce ions of the same size
The prediction that is supported by the information in the table is: "K will give up an electron more easily than Br."
This can be determined by looking at the electron configuration of K and Br. Potassium (K) is located in group 1 of the periodic table and has one valence electron in its outermost shell. Bromine (Br) is located in group 17 of the periodic table and has seven valence electrons in its outermost shell. The closer an element is to the edge of a group, the more likely it is to lose electrons and form a positive ion (cation). As K is closer to the edge of group 1 and has fewer valence electrons than Br, it is more likely to lose an electron and become a cation, K+.
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Water is essential to life. Which property of water affect(s) life less than the others?
a) Hydrogen bonds
b) Nearly colorless
c) Cohesiveness
d) High heat capacity
e) High heat of vaporization
Water is necessary for life. b) Nearly colorless property of water has the least impact on life
While all of the properties of water are important for life, the property of being nearly colorless is the one that affects life the least. The other properties, such as hydrogen bonding, cohesiveness, high heat capacity, and high heat of vaporization, all play critical roles in the functioning of living organisms and the environment. Hydrogen bonds between water molecules give water its high surface tension, which allows for the cohesion of water molecules that allows for the movement of water in plants, and the cohesion and adhesion property of water that allows for the movement of water in rivers and oceans. High heat capacity and high heat of vaporization are also important for maintaining a stable temperature range for living organisms.
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the _____ functional group can always be found in a carbohydrate molecule.
Carbohydrates usually contain a carbonyl (=O) and hydroxyl (−OH) functional group.
Carbonyl (=O) and hydroxyl (=OH) functional groups are typically present in carbohydrates. In polysaccharides, where the hydroxyl groups typically establish hydrogen bonds with the carbonyl groups, the carbonyl group joins with a carbon atom to form a ring structure. Amino, carboxyl, and R are the functional groups found in proteins (variant). Note: Complex assemblies are created when proteins interact with other biological macromolecules and one another.
Based on the functional monomer found in carbs, this classification was created. Ketone and aldehyde serve as monomers in carbohydrates. That suggests that carbs are divided into aldose and ketose. Depending on how many carbon atoms there are, carbohydrates can be divided into numerous categories.
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Which method would provide evidence to support the inference that this is a exothermic reaction
The chemical change that would provide evidence of exothermic reaction is evolution of heat.
What is a chemical change?Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.
There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.
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I don’t understand how to do this it’s very confusing
Answer:
a Naturally occurring and stable =
b. naturally occurring and radioactive
she decides to repeat the experiment using lower concentrations of lead than those she used initially. what conclusion can the scientist in this scenario make from her results?
If the scientist repeats the experiment using lower concentrations of lead than those she used initially, she can draw several conclusions based on the results of the experiment.
If she finds that the results are similar or the same as her initial experiment, she can conclude that the effect observed in her initial experiment is likely due to the lead and not a result of chance. This would provide support for her hypothesis that lead is responsible for the observed effect. Additionally, this could also indicate that the effect is likely to be present at a wide range of lead concentrations, and not just at the higher concentrations used in the initial experiment. If the results are different, however, she may conclude that the effect is dependent on the concentration of lead and that lower concentrations have a weaker effect. For example, she may have used different methods for preparing the lead solutions in the repeat experiment which could have led to variations in the final concentrations.
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A spring with a spring constant of 3N/m is stretched until extended by 1.4m. How much elastic potential energy is stored by the spring?
Give your answer to 2 decimal places
The energy that is stored in the spring is 2.94 J.
What is the elastic potential energy?We have to note that the elastic potential energy of the spring is the energy that has been stored in the spring and it is released to be able to do work once we pull the spring.
In this case we already know that;
W = 1/2Ke^2
W = work done
K = force constant
e = extension
Thus;
W = 0.5 * 3 * 1.4^2
W = 2.94 J
We can see that the stored energy for the spring in question is 2.94 J of energy stored.
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a solution of silver nitrate is mixed with a solution of iron(iii) chloride. write the balanced equation and then determine how many grams of precipitate can be formed with 75.0ml of 0.100m iron(iii) chloride.
Moles=Concentration x Volume
Moles = 0.100 x (75/1000) = 0.0075 moles.
We can use the molar mass of AgCl to calculate the mass of AgCl precipitate formed:
Mass of AgCl = moles of AgCl x molar mass of AgCl
mass of AgCl = 0.0075 moles x 143.32 g/mole
mass of AgCl = 1.07 g
Is AgCl soluble or insoluble?It is well verified that AgCl is insoluble in water while NaCl and KCl are soluble. Hence, AgCl is very much less soluble than NaCl or KCl.
What is AgCl-acidic or basic?The base of silver is weak, whereas chlorine acid is strong. When the weak base responds with a strong acid, it forms acidic salt. It indicates the salt that produces acidic pH, becomes a base when liquefied in water.
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bromobenzene used in the experiment is 3.2 g. what is the mass of magnesium turnings (mg) that is 1.25 molar equivalent to the amount of bromobenzene used? use the molar mass data available in the manual.
We can calculate the number of moles of magnesium that is equivalent to the bromobenzene used:
n_Mg = n_Br * 1.25 = 0.020mol * 1.25 = 0.025mol
Finally, we can calculate the mass of magnesium:
m = n * M
m = 0.025mol * 24.31 g/mol = 0.6 g.
So the mass of magnesium turnings equivalent to the amount of bromobenzene used is 0.6 g.
What is a molar equivalent?A molar equivalent is a unit of measurement that corresponds to the number of moles of a reactant that is needed to react with one mole of another reactant.
What is bromobenzene used for?Bromobenzene is a clear, colorless liquid with a pleasant odor. It is primarily used as a solvent and motor oil additive, and in making other chemicals.
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1,1-dibromo-4-methylhexane is treated first with excess sodium amide and quenched with water. catalytic hydrogenation affords what final product? (give correct iupac name.)
When 1,1-dibromo-4-methylhexane is treated first with excess sodium amide and quenched with water will give 1-bromo-4-methylhexane as the final product. This reaction is a reductive amination.
Here the sodium amide acts as a reducing agent to convert the C=C double bond into a C-C single bond and the nitrogen atom acts as a nucleophile to displace the bromine atom. The catalytic hydrogenation is then used to reduce the remaining C-Br bond to a C-H bond, which results in 1-bromo-4-methylhexane.
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How would you prepare 500cm³ solution of 0.25 mol/dm³ of Potassium hydrogen phthalate KHC8H4O4 (K=39, H=1 C=12 O=16)
We would need to measure 25.5 g of the potassium hydrogen phthalate an d make up to 500cm³ mark.
What is the preparation?We know that we can be able to prepare a chemical if we can be able to measure out a given mass of the chemical that is in question and then make up to the mass that we need.
In the case of the Potassium hydrogen phthalate that we have;
Number of moles to be prepared = concentration * volume
= 0.25 mol/dm³ * 500/1000 L
= 0.125 moles
Mass of the compound = Molar mass * Number of moles
= 0.125 moles * 204 g/mol
= 25.5 g
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what trend do you notice for electronegativity down a family? explain the reason for this trend in 2-3 sentences.
Answer:
Going down a family means the elements are getting larger. As more electrons surround the positively charged nucleus, they reduce the attractive electrostatic force because they are further away, and existing electrons repulse them.
Explanation:
Electronegativity is a measure of the attraction an element has for electrons. Fluorine has a high electronegativity (2.98), while Francium does not (0.7). Fluorine more readily attracts other electrons. When going down a family on the periodic table, electronegativity decreases. This is because the existing electrons have already filled the electron shells closest to the positive nucleus. A new electron arriving near Francium doesn't experience the full attraction of the nucleus since it so far away. The existing electrons form a repulsive barrier.
1. How many moles of methane (CH4) are needed to produce 5.75 moles of water vapor? (Assume excess oxygen.) CH4(g) +202(g) → CO₂(g) + 2H₂O(g)
5.75 moles of water vapor require 2.875 moles of methane, CH4, which is required in a different way.
How can I calculate the necessary mole of CH4?The moles of CH4 that reacted from the balanced equation will be obtained first.
O2 + CH4 = CO2 + 2H2O
Given the above-mentioned balanced equation,
From 1 mole of CH4, 2 moles of H2O were created.
We can calculate the amount of moles of CH4 required for the reaction using the information above. Details are provided below:
Given the above-mentioned balanced equation,
From 1 mole of CH4, 2 moles of H2O were created.
Therefore,
The formula is: (5.75 1) / 2 = 2.875 moles of CH4 yields 5.75 moles of H2O.
The formula is: (5.75 1) / 2 = 2.875 moles of CH4 yields 5.75 moles of H2O.
In light of this, we can say that 2.875 moles of CH4 are required.
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2. Which of the following types of particles found in an atom has no charge?
A. Electron
B. Nucleus
Neutron
D. Proton
Answer: Neutron
Explanation:
Protons have a positive charge (+).
Electrons have a negative charge (-).
Neutrons have no charge.
Which process is spontaneous?
Answer:
The separation of sodium and chlorine from sodium chloride
Explanation:
When sodium chloride reacts with water to form the aquated sodium and chloride ions, the entropy increases and thus the reaction is spontaneous
calculate the volume in milliliters of a m sodium chloride solution that contains of sodium chloride . round your answer to significant digits.
The NaCl solution has a 1.7 L volume.
Molarity (M) is calculated by dividing the volume of the solution (V) in liters by the number of moles of solute (n). Not moles of solute per liter of solvent, but rather moles of solute per liter of solution, is a crucial distinction to make when defining molarity.
The volume of the NaCl solution is 1.7 L.
First step: Information is given
The molarity of sodium chloride is 1.8 M.
The mass of sodium chloride is 175 grams.
The molecular weight of sodium chloride is 58.44 g/mol.
Step 2: Calculate the moles of sodium chloride.
Mass NaCl divided by molar mass NaCl equals moles of NaCl.
58.44 grams/mole of sodium chloride, or 175.0 grams
2.995 moles are equal to one NaCl mole.
3. Calculate the volume of the solution.
Ratio of volume to mole
Volume equals Molarity times Molar NaCl.
Volume = 1.9 M / 2.995 M
= 1.66 to 2.7 liters in volume.
The NaCl solution has a 1.7 L volume.
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Complete Question -
Calculate the volume in liters of a 1.8M sodium chloride solution that contains 175. g of sodium chloride (NaCI). Round your answer to 2 significant digits.
You have piece of copper that has a mass of 3.8 grams. How much energy/heat (in units of Joules) is needed to warm the
piece of copper from 11°C to 27°C? The specific heat of copper is 0.32 Joules/((1g)(1°C))
Answer:To find the amount of energy needed to warm the piece of copper from 11°C to 27°C, you can use the formula:
Energy = (mass of copper) x (specific heat of copper) x (change in temperature)
So in this case, the energy would be:
Energy = (3.8 grams) x (0.32 Joules/((1g)(1°C))) x (27°C - 11°C)
Energy = 3.8 x 0.32 x 16
Energy = 12.288 Joules
Therefore, 12.288 Joules of energy is needed to warm the piece of copper from 11°C to 27°C.
Explanation:
Choose which of the four Spartan files is most likely to be the best approximation of the actual complex, SEFeox3LS, SEFeox3HS, B3LYPFeox3LS, or B3LYPFeox3HS. Open that file the one deemed to be the most stable spin case of Fe ( ox ) 3 − 3 in the previous question. Go to the Setup window and choose Calculations. Click the boxes next to Infrared Spectra and Vibrational Modes. Click Submit. The calculation time will depend on the processor in the computer, but may need to run overnight
More stability is demonstrated by [Fe(C). 2 \s \s O \s4 \s \s ] \s3− In comparison to non-chelates, metal chelates are more stable. Oxalate produces metal chelates.
stability and is a bidentate ligand. Because of this, [Fe(C 2 O 4 ] 3 is more stable.the four Spartan files is most likely to be the best approximation of the actual complex, SEFeox3LS, SEFeox3HS, B3LYPFeox3LS, or B3LYPFeox3HS. Open that file the one deemed to be the most stable spin case of Fe ( ox ) 3 − 3 in the previous . Go to the Setup window and choose Calculations. Click the boxes next to Infrared Spectra and Vibrational Modes. The calculation time will depend on the processor in the computer, but may need to run overnight [Co(en)3] [Co(NH3)6] is less stable than 3+. As [Co(en)3], 3+ Due to the presence of the bidentate ligand, ethylene diamine, 3+ is a metal chelate. Comparatively speaking, monodentate lignad-only complexes are less stable than metal chelates.
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Aluminum + hydrochloride acid yield aluminum chloride + hydrogen gas
What’s the balanced equation?
Aluminum + hydrochloride acid yield aluminum chloride + hydrogen gas therefore the balanced equation is 2Al+6HCl→2AlCl₃+3H₂.
What is a Chemical reaction?This is referred to as the process in which one or more substances which are called the reactants, are converted to one or more different substances known as the products and it involves the exchange of electrons between elements.
In this scenario, when Aluminum and hydrochloride acid reacts they form aluminum chloride and hydrogen gas which is the product and the equation can be seen above.
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a molecule will always be polar if it . a. consists of more than three atoms b. has polar bonds c. is diatomic with different electronegativities d. contains atoms with different electronegativities e. contains both carbon and chlorine
A molecule will always be polar if it has polar bonds.
For a molecule to be polar, it must have polar bonds and have those bonds organized in such a way that the bond dipoles do not cancel each other out. Molecules that are polar have both positively and negatively charged parts. A common polar substance is water. Because of its structure and the types of bonds it contains, the molecule has a slight positive charge at one end (the hydrogen end) and a slight negative charge at the other (the oxygen end). Due to the uneven distribution of electrons among the atoms and the asymmetrical nature of the water molecule, the hydrogen atoms at one pole of the molecule are positively charged, while the oxygen atoms at the other pole are negatively charged (side). We use the term "electrically polar" to describe the water molecule.
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calculate the separation r in nanometers beyond which the inter- action energy between a barium ion and a bromide ion falls below kt at room temperature in a vacuum.
At room temperature in a vacuum, the distance r in nanometers beyond which the interaction energy between a barium ion and a bromide ion drops below kt is 334400 nm.
The electrostatic force between two charges is expressed mathematically as, [tex]F_e=k\frac{Q_1\times Q_2}{r^2}[/tex] where Q₁ and Q₂ represent the charges, r represents the distance between the charges, and k (9×10⁹ Nm²/C²) represents the Coulombs constant.
Also, charge on Barium,
[tex]\begin{aligned}Q_1&=+2p\\&= \mathrm{2\times1.6\times10^{-19}\;C}\\&= \mathrm{3.2\times10^{-19}\;C}\end{aligned}[/tex]
The charge on Bromide ion,
[tex]\begin{aligned}Q_2&=-1p\\&= \mathrm{-1\times1.6\times10^{-19}\; C} \\&= \mathrm{-1.6\times10^{-19}\; C}\end{aligned}[/tex]
Then,
[tex]\begin{aligned} F_e&=\frac{(9\times10^9\times 3.2\times10^{-19}\times1.6\times10^{-19})}{r^2}\\&= \frac{(46\times10^{-29})}{r^2}\end{aligned}[/tex]
Also, F= kT where k represents the Boltzmann constant and T represents the room temperature (298 K).
Then,
[tex]\begin{aligned}F&=\mathrm{1.38\times10^{-23}\;J/K\times298\;K}\\&=\mathrm{41.124\times 10^{-22}\; J}\end{aligned}[/tex]
Solving both forces,
[tex]\begin{aligned}\frac{46\times10^{-29}}{r^2}& = 41.124 \times 10^{-22}\\r^2&=\frac{46\times10^{-29}}{41.124 \times 10^{-22}}\\&=1.1185\times10^{-7}\\r&=\mathrm{3.344\times10^{-4}\;m}\\&=\mathrm{334400\;nm}\end{aligned}[/tex]
The required answer in nanometers is 334400 nm.
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Water is then released and passes through a turbine to produce what?
Water is released and passes through a turbine to produce electricity.
A mechanical device called a turbine transforms the kinetic energy of moving water into mechanical energy. A generator is then used to turn this mechanical energy into electrical energy. A shaft connects the turbine and generator, allowing the turbine to spin the generator and generate power. The turbine's blades spin as the water passes past it, spinning the generator, which produces power. This method is referred to as hydropower and is a renewable energy source.
The ideas Faraday established form the foundation of how a generator works. He discovered that moving a magnet past a conductor makes electricity flow. In a large generator, electromagnets are made by circulating direct current through loops of wire wound around stacks of magnetic steel laminations. These are called field poles and are mounted on the perimeter of the rotor.
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an unknown compound has the following chemical formula: where stands for a whole number. measurements also show that a certain sample of the unknown compound contains of sulfur and of phosphorus. write the complete chemical formula for the unknown compound.
The complete chemical formula for the unknown compound P₄Sₓ is P₄S₆.
The given unknown compound has the formula P₄Sₓ , where P stands for phosphorus and S stands for sulphur. "X" stands for a whole number which denotes the number of sulphur atoms in the compound.
To determine the value of "X" we need to know the ratio between P and S. There are 4 phosphorus atoms present in the compound.
Since it is given that, we have 6.3 moles of phosphorus(P) and 9.4 moles of sulphur (S). In order to express this in terms of 1, we can divide both sides by 6.3 moles to get a ratio of 1 to 1.5
P= 6.3/6.3= 1
S= 9.4/6.3=1.5
This implies, for every 1 P, there is 1.5 S . So, for 4 P we get;
P= 1× 4= 4
S= 1.5× 4= 6
Thus, for every 4 P we will have 6 S.
Hence, the complete chemical formula is P₄S₆.
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how much heat energy (in kj) will be absorbed or released if 8.33 grams of ammonia is produced?
-22.57 kJ of heat energy will be absorbed when 8.33 grams of NH3 is produced.
To determine the amount of heat energy absorbed or released when 8.33 grams of ammonia (NH3) is produced, we need to use the balanced equation for the reaction and the heat of formation for NH3.
The balanced equation for the production of NH3 is:
N2(g) + 3H2(g) → 2NH3(g)
The heat of formation, or delta Hf, of a substance is the amount of heat absorbed or released when one mole of a substance is formed from its elements at standard conditions. The standard enthalpy of formation (ΔHf°) for NH3 is -46.19 kJ/mol
To find out the amount of heat energy absorbed or released when 8.33 grams of NH3 is produced, we need to know the molar mass of NH3 and use it to convert the mass to moles, then multiply it by the enthalpy of formation.
The molar mass of NH3 is equal to 17 g/mol.
8.33 grams NH3 / 17 g/mol = 0.492 mol NH3
The heat energy absorbed or released when 8.33 grams of NH3 is produced is:
-46.19 kJ/mol * 0.492 mol NH3 = -22.57 kJ
So, -22.57 kJ of heat energy will be absorbed when 8.33 grams of NH3 is produced.
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