Question

Imagine two 2.0 g bags of protons, one at the earth's north pole and the other at the south pole. part a how many protons are in each bag?

Answer 1

Answer: $1.19\times10^{24}$

Mass of each proton $= 1.67\times10^-27 \hspace{1mm} kg$

Mass of protons in each bag = 2.0 g

Number of protons in each bag

$= \frac{Mass\hspace{1mm} of \hspace{1mm} protons \hspace{1mm} in \hspace{1mm} each \hspace{1mm} bag}{Mass \hspace{1mm} of \hspace{1mm} each \hspace{1mm} proton}\\ =\frac{2\times10^-3kg}{1.67\times10^{-27}kg}=1.19\times10^{24}$