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Arisa [49]
3 years ago
12

A scientific theory is

Chemistry
1 answer:
vlada-n [284]3 years ago
7 0
The answer is A. an explanation
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Water from a lake changes to a gas state in the process of what?
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When can all the coefficients in a balanced equation represent volume ratios? when reactants and products are solids at stp when
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Answer: when reactants and products are gases at STP.


Justification:


1) STP stands for standard temperature (0°) and pressure (1 atm).


2) According to the kinetic molecular theory of the gases, and as per Avogadro's principle, equal volumes of gases, at the same temperature and pressure, have the same number of molecules.



3) Since the coefficients in a balanced chemical equation represent number of moles, when reactants and products are gases at the same temperature and pressure, the mole ratios are the same that the volume ratios, and then the coefficients of the chemical equation represent the volume ratios.


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Coal containing 15.0% H2O, 2.0% S and 83.0% C by mass is burnt with the stoichiometric amount of air in a furnace. What is the m
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Answer:

This is a coal combustion process and we will assume

Inlet coal amount = 100kg

It means that there are

15kg of H2O, 2kg of Sulphur and 83kg of Carbon

Now to find the mole fraction of SO2(g) in the exhaust?

Molar mass of S = 32kg/kmol

Initial moles n  of S = 2/32 = 0.0625kmols

Reaction:  S + O₂ = SO₂

That is 1 mole of S reacts with 1 mole of O₂ to give 1 mole of SO₂

Then, it means for 0.0625 kmoles of S, we will have 0.0625 kmole of SO2 coming out of the exhaust

The mole fraction of SO2(g) in the exhaust=0.0625kmols

Explanation:

5 0
2 years ago
In which of the following reactions will Kc = Kp? Group of answer choices N2(g) + 3 H2(g) 2 NH3(g) N2O4(g) 2NO2(g) CO(g) + 2 H2(
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Answer:

H₂(g) +I₂(g) ⟶ 2HI(g)

Explanation:

Kc =Kₚ when the number of moles of gaseous products equals the number of moles of gaseous reactants.

The HI reaction has two moles of gas on each side of the reaction arrow.

K = (Products)ⁿ/(Reactants)ⁿ = (Products/Reactants)ⁿ

Thus, if n is the same for products and reactants, you will get the same number whether you use concentrations or pressures, and Kc = Kₚ

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3 years ago
The slight negative charge at one end of one water molecule is attracted to the slight positive charge of another water molecule
Novay_Z [31]
B hydrogen bond i think
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