If 2 mol of H2 and 2 mol of O2 react as in 2H2 + O2 -> 2H2O, what mass of water is formed? (H = 1, O = 16)

NEET levelSingle correct optionDifficulty 1 of 3mc039

If $2$ mol of $H X_{2}$ and $2$ mol of $O X_{2}$ react as in $2 H X_{2} + O X_{2} 2 H X_{2} O$ , what mass of water is formed? (H = 1, O = 16)

2

mol

H X_{2}

needs only

1

mol

O X_{2}

, so

H X_{2}

is the limiting reagent and

2

mol water forms. Mass

= 2 \times 18 = 36 g

. Using

O X_{2}

as the basis gives the wrong value

72