Question

4.6 into 10 to the power 22 atoms of an element weigh 13.8gm. the gram atomic mass of the element is?

Answer 1

moles= molecules/avagadro no
$n = 4.6 \times 10 {}^{22} \div 6.032 \times 10 {}^{23}$
n=0.064
0.064=13.8÷gram molecular weight
gram molecular weight =215.6