Answer : The number of moles of hydrogen gas needed are, 0.253 mole
Explanation : Given,
Moles of water = 0.253 mole
Now we have to calculate the moles of hydrogen gas.
The given balanced chemical reaction is,
\(2H_2+O_2\rightarrow 2H_2O\)
From the balanced reaction we conclude that,
As, 2 moles of water obtained from 2 moles of hydrogen gas
So, 0.253 moles of water obtained from \(\frac{2}{2}\times 0.253=0.253mole\) of hydrogen gas
Therefore, the number of moles of hydrogen gas needed are, 0.253 mole
