Question

The number of molecules in 73 g HCI CI=35.5​

Answer 1

no. of molecule=mole× avagadro no. ,, mole of HCl = 73/1+35.5 , mole of HCl= 73/36.5 , mole of HCl = 2 then no. of molecule = 2×6.02×10^23 , no.of molecule in HCl = 12.04×10^23

Answer 2

HCl:

mass= 73 g

molar mass=36.5g

$moles = \frac{73}{36.5} = 2$

$moles = \frac{n \: hcl}{n}$

$n \: hcl \: = 2 \times 6.023 \times {10}^{23}$

I hope this helps ( ╹▽╹ )