Introducing chemical reactions

Easy

The formula of magnesium nitrate is $Mg(NO3)2\text{Mg(NO}_3)_2$ .

What is the relative formula mass of magnesium nitrate? ( $ArA_{\text{r}}$ : $Mg=24\text{Mg} = 24$ , $N=14\text{N} = 14$ , $O=16\text{O} = 16$ )

$86$

$100$

$148$

$172$

Introducing chemical reactions Questions