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oksian1 [2.3K]
4 years ago
14

Give two reasons why scientists use the scientific method

Chemistry
1 answer:
forsale [732]4 years ago
6 0
They use it because it's standerize and evidence vase
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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:

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3 years ago
Which of the following is a property of water
lozanna [386]

Answer:

Where are the following?

Explanation:

The main properties of water are its polarity, cohesion, adhesion, surface tension, high specific heat, and evaporative cooling.

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(?) NH4NO3 ---> (?) N2O + (?) H2O
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NH4NO3 -> N2O + 2H2O

Explanation:

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lakkis [162]

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Balance the following chemical equation (if necessary):
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Ca(C2H302)2(aq) + Na2CO3(aq) —> CaCO3(s) + 2 NaC2H302(aq)
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