Question

AP Chemistry
How many grams of oxygen are in 28.2 g of H2SO4?

Answer 1

There are 18.4 g O in 28.2 g H_2SO_4.

M_r = 2× 1.008 + 32.06 + 4×16.00 =2.016 + 32.06 + 64.00 = 98.076

∴ There are 64.00 g O in 98.076 g H_2SO_4.

Mass of O = 28.2 g H_2SO_4 × (64.00 g O/98.076 g H_2SO_4) = 18.4 g O