Question

In the reaction below, 8.0 g of H2 react with 9.0 g of O2. Which of the following statements is true?
_2_ H2 + _1_ O2 _2_ H2O

Answer 1

Here, the reaction is as follows

$H_2+O_2\longrightarrow2H_2O$

Here given that mass of H₂=8.0 g and mass of H₂O= 9.0 g

moles of $H_2=\frac{given mass}{molar mass}= \frac{8}{2}= 4$ mole and

moles of $O_2= \frac{given mass}{molar masS}=\frac{9}{32}$ =0.2812

so here O₂ is limiting reagent and

massof $H_2O = 18\times.2812=5.06 g$