Chemistry

Problem

A sample contains

2.80\times10^{24}

formula units of

\text{Al}_{2}(\text{SO}_{4})_{3}\cdot18\text{H}_{2}\text{O}

. Determine the mass of water in the sample, expressed in kilograms and rounded to three significant figures. a)

0.0838\,\text{kg}

1.34\,\text{kg}

1.51\,\text{kg}

15.1\,\text{kg}