# What is the mass of 3.21 * 10^-2 mol Ni?

$1.8939 g$
put the formula $m o l s = m a s s \div i \mathrm{de} a r$ then rearrange the formula and multiply the mols with the ar of nickel which is 59 so
$59 \cdot {3.21}^{10} - 2$ and the ans will be $1.8939 g$