What is the total mass of oxygen contained in 8.20g of benzoic acid (C6H5COOH)

Mass of oxygen = 2.2 g

Explanation:

Given dа ta:

Mass of benzoic acid = 8.20 g

Mass of oxygen=?

Solution:

Molar mass of oxygen = 16*2 g/mol

Molar mass of C₆H₅COOH = 7*12 + 1*6 + 2*16

Molar mass of C₆H₅COOH = 84 + 6 + 32

Molar mass of C₆H₅COOH = 122g/mol

Mass of oxygen in 8.20 g of C₆H₅COOH:

Mass of oxygen = 32 g. mol⁻¹/122 g. mol⁻¹ * 8.20 g

Mass of oxygen = 2.2g