Question

How many moles Of H2O will be produced from 42.0 g of H2O2?

Answer 1

$Molar{Mass} H_{2}O_{2} =2*16.0+2*1.0= 34.0 g/mol 42.0 g H_{2}O_{2}* \frac{1 mol H_{2}O_{2}}{34.0 g H_{2}O_{2}} = 1.24 mol H_{2}O_{2} 2H_{2}O_{2} --\ \textgreater \ 2 H_{2}O +O_{2} \\2 mol ----2 mol (from// reaction) \\1.24 mol ---1.24 mol (from the problem) Answer: 1.24 mol H_{2}O.$