Answer:
To answer this question, we need to first write the balanced chemical equation for the combustion of C2H2:
C2H2 + 2.5 O2 → 2 CO2 + H2O
From the equation, we can see that for every mole of C2H2 burned, we produce one mole of water (H2O).
To find the number of moles of C2H2 in 25.0 grams, we need to divide the mass by the molar mass:
molar mass of C2H2 = 2(12.01 g/mol) + 2(1.01 g/mol) = 26.04 g/mol
moles of C2H2 = 25.0 g / 26.04 g/mol = 0.961 mol
Therefore, the number of moles of H2O produced is also 0.961 mol.