Step 1
It is known that under STP conditions:
1 mole of any gas (N2 in this case) = 22.4 L
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Step 2
Information provided:
4.25 liters of N2 at STP
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Step 3
Procedure:
4.25 L x (1 mole N2/22.4 L) = 0.19 moles of N2
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The number of moles = mass of N2/the molar mass of N2
(the molar mass of N2 = 28.0 g/mol)
Therefore,
The number of moles = mass of N2/28.0 g/mol
0.19 moles N2 x 28.0 g/mol = 5.32 g
Answer: 5.31 grams (the nearest option)
