For the formation of 1 mole of NO, 90.37 kJ of heat is required. Calculate the mass of nitric oxide (II)

For the formation of 1 mole of NO, 90.37 kJ of heat is required. Calculate the mass of nitric oxide (II) formed during the absorption of heat in the amount of 9037 kJ.

The mass of a substance is determined by the formula:

m = n M.

1. Let’s find the amount of nitric oxide substance. Knowing that 90.37 kJ of heat is required to form 1 mol of oxide, then n (mol) of oxide is formed when 9037 kJ of heat is consumed.

Let’s make a proportion.

1 mol (NO) – 90.37 kJ,

n (NO) – 9037 kJ,

n (NO) = (9037 kJ x 1 mol): 90.37 kJ,

n (NO) = 100 mol.

2. Find the mass of the oxide.

M (NO) = 14 + 16 = 40 g / mol.

m = 100 mol x 40 g / mol = 4000 g.

Answer: m = 4000 g = 4 kg.