Question

what is the mass of 6*10^24 atoms of magnesium​

Answer 1

1 mole of Mg= 24gm

$6 \times 10 ^{23} \: \: atoms = 24gm$

$6 \times 10 ^{23} \times 10 \: atoms \: = 24 \times 10 = 240gm$