Homework Answers
Molar mass of H2O,
MM = 2*MM(H) + 1*MM(O)
= 2*1.008 + 1*16.0
= 18.016 g/mol
mass of H2O = 14.9 g
mol of H2O = (mass)/(molar mass)
= 14.9/18.02
= 0.827 mol
According to balanced equation
mol of O2 required = (1/2)* moles of H2O
= (1/2)*0.827
= 0.4135 mol
At STP, molar volume is 22.4 L/mol
So,
Volume = number of mol * molar volume
= 0.4135 mol * 22.4 L/mol
= 9.26 L
Answer: 9.26 L
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