A laboratory bottle contains of ammonium sulfate,

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

A laboratory bottle contains

3.75 \times 10^{4}\;\text{mg}

of ammonium sulfate,

(\text{NH}_4)_2\text{SO}_4

. Using the relative atomic masses N = 14.01, H = 1.008, S = 32.07, and O = 16.00, determine the amount of

(\text{NH}_4)_2\text{SO}_4

in the bottle, expressed to three significant figures. (a)

2.84\;\text{mol}

(b)

2.84 \times 10^{-1}\;\text{mol}

(c)

3.29 \times 10^{-1}\;\text{mol}

(d)

2.84 \times 10^{-2}\;\text{mol}