Ammonia is oxidised by oxygen to give nitric oxide and water. The weight of water produced per gram of nitric oxide is _____grams

Given, chemical reaction

$4{NH}_3+5O_2⟶4NO+6H_{2}O$

Moles of NO = 4 moles

Moles of $H_{2}O=6moles$

4 moles of NO produced with 6 moles of water

430 grams of NO = 618 grams of $H_{2}O$

1 grams of NO = $\frac{6\times 18}{4\times 30}=0.9gramsof{H}_{2}O$

Therefore, weight of water produced per gram of nitric acid is 0.9 grams.