Answer to Question #150145 in General Chemistry for Grace

Question

write the chemical equation how many grams of water are produced when 2.50 mol oxygen gas reacts with excess hydrogen gas

Answer 1

$O2 + 2 H2 = 2 H2O$

$2×2.5=5mol of H2O$

$Molar Mass of water =18g/mol$

$1mol of water =18g$

$5mol=?$

$=5×18$

$Answer=90g$