A Sample of Water Has a Mass of 10 $(\mathrm{H}=$ $1 \mathrm{u}, \mathrm{O}=16 \mathrm{u}$

Multiple Choice

A sample of water has a mass of 10.0 grams. What is the number of molecules of water in the sample? $(\mathrm{H}=$ $1 \mathrm{u}, \mathrm{O}=16 \mathrm{u}$ , and $1 \mathrm{u}=1.66 \times 10^{-27} \mathrm{~kg}$ .)

A) $2.00 \times 10^{23}$
B) $3.35 \times 1023$
C) $4.25 \times 1023$
D) $1.99 \times 10^{23}$
E) $2.56 \times 10^{23}$