Question

Calculate the no of molecule atom present 46g of sodium

Answer 1

Number of moles = amount in g/ molar mass

= 46 g / 23 g/ mole  

= 2 mole

1 mole = 6.022*10^23 molecules  

Then  

2 mole Na * 6.022*10^23  Molecules / 1 mole

= 1.2044*10^24 molecules