For each carbon, hydrogen and nitrogen. You need to divide each percentage by its atom mass.C = 53.5/12.0107 = 4.45436H = 15.5/1.00794 = 15.377899N= 31.1/14.0067 = 2.220365

Round the number to far-reaching figuresC = 4.45H =15.4N =2.22

Divide each Number by the smallest number out of the threeso N = 2.22/2.22 =1H = 15.4/2.22= 6.9 =7C = 4.45/2.22= 2So the Formula must Be C2H7N

Explanation:

1) at STP, 1 mol of gas occupies 22.4 l of volume.

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1 l of volume will certainly be inhabited by :

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Then, 500 together of volume will be lived in by:

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frac122.4 Ltimes 500L =22.32 molapprox 22 mol" title="e65bd">

There will certainly be 22 moles in 500 together of helium gas at STP.

2) molecular mass that barium chromate= 253.37 g/mol

Atomic mass of chromium= 52 g/mol

Percentage of an aspect in a compound:

Percentage that chromium:

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20.5% is the portion of chromium in the offered molecular formula.

3)The empirical formula that a substance the is 53.5% C, 15.5% H, 31.1% N through weight.

In 100 g of substance, massive of carbon = 53.5 g

Moles of carbon =

In 100 g the substance, mass of hydrogen= 15.5 g

Moles the carbon =

In 100 g of substance, fixed of nitrogen= 31.1 g

Moles of carbon =

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For empirical formula, division smallest number of moles the an element from all the constituting moles of the elements.

Carbon =

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Hydrogen =

*

Nitrogen =

The empirical formula is

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.

4) mix reaction is a type of a chemistry reaction in which 2 or more reactant reacts together to give single product.

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Oxide of steels are simple in nature and also when they liquified in water they form basic systems of their respective hydroxide.So, barium hydroxide is do by dissolving barium oxide(BaO) in water.