Calculate the amount of substance corresponding to 12.6 g of nitric acid.

univerkov | September 11, 2021 | education

Given:

m (HNO3) = 12.6 g.

Find:

n (HNO3) =?

Solution:

1) The amount of substance is determined by the formula: n = m: M.

2) Find the molecular weight of nitric acid using the periodic table:

M (HNO3) = 1 + 14 + (16 x 3) = 63 g / mol.

3) n (HNO3) = 12.6 g: 63 g / mol = 0.2 mol.

Answer: n (HNO3) = 0.2 mol.

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