Answer to Question #333362 in Chemistry for danny

Question

How many molecules are in 3.5918 g of sulfuric acid, H₂SO₄? Show full work. Include units beside every number where applicable. Round your final answer to correct significant figures.

Answer 1

Solution:

The molar mass of sulfuric acid (H₂SO₄) is 98.079 g/mol

Therefore,

Moles of H₂SO₄ = (3.5918 g H₂SO₄) × (1 mol H₂SO₄ / 98.079 g H₂SO₄) = 0.03662 mol H₂SO₄

One mole of any substance contains 6.022×10²³ atoms/molecules.

Therefore,

No of H₂SO₄ molecules = (0.03662 mol) × (6.022×10²³ molecules / 1 mol) = 2.2053×10²² molecules

Number of H₂SO₄ molecules = 2.2053×10²² molecules

Answer: 2.2053×10²² molecules of sulfuric acid (H₂SO₄)