Question
Asked Oct 5, 2019

How do you calculate the mass of Hydrogen in 12.00 g of NH3?

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Expert Answer

Step 1

Given:

Mass of NH3 = 12.00 g.

Molar mass of NH3 = 17.031 g/mol.

Step 2

Calculation for number of moles of NH3:

mass
number of moles
molar mass
12.00 g
number of moles =
17.031 g/mol
number of moles = 0.7046 moles.
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mass number of moles molar mass 12.00 g number of moles = 17.031 g/mol number of moles = 0.7046 moles.

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Step 3

Calculation for number of moles of H:

1 mole of ...

1 mol NH33 mol H
0.7046 mol NH3 xmol H
0.7046 mol NH3 x 3 mol H
1 mol NH3
X =
x 2.1138 mol H
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1 mol NH33 mol H 0.7046 mol NH3 xmol H 0.7046 mol NH3 x 3 mol H 1 mol NH3 X = x 2.1138 mol H

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