Question

Convert into mole:
(a)28g of nitrogen atoms
(b)20g of carbon dioxide

Answer 1

Answer:

Explanation:

a)no of moles =given mass /molar mass

here it is said that it is an atom so we can take molar mass =14u

moles=28/14

=2 moles

b)since it is a molecule and it has a molecular mass =12+32=44

no of moles =20/44=5/11

moles=5/11