Based on the data provided, the mass of water produced is 1.26 × 10^-2 g.
The equation of the combo of methane is add follows:
CH4 + 2O2 ----> CO2 + 2H2O
moles of methane in 6.30 × 10^-3 g = 6.30 × 10^-3 g/ 18 g/mol
moles of methane = 3.5 × 10^-4 moles
3.5 × 10^-4 moles of methane will produce 2 × 3.5 × 10^-4 moles of water = 7.0 × 10^-4 moles
mass of water produced = 18 g/mol × 3.5 × 10^-4 mol = 1.26 × 10^-2 g.
Therefore, the mass of water produced is 1.26 × 10^-2 g.
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