A chemist isolates of ammonium phosphate,

CHEMISTRY · Subjective · AP · Chemistry · Atomic Structure and Properties · Atomic Structure and Properties

Problem

A chemist isolates

4.00 \times 10^{-3} \, \text{kg}

of ammonium phosphate,

(\text{NH}_4)_3\text{PO}_4

. Atomic masses:

N=14.01

H=1.008

P=30.97

O=16.00\,\text{u}

. Calculate the number of

(\text{NH}_4)_3\text{PO}_4

formula units present in the sample. Give your answer in scientific notation.