Question

Calculate how many Methane molecules and how many hydrogen and carbon atoms are there in 25 gram of Methane?

Answer 1

#number number of Methane molecules =given mass /molar mass ×Avogadro number

25/16×6.022×10^23

9×10^23 molecules

# now Number of hydrogen atoms=

4×25×6.022×10^23

=602.2×10^23 atoms

#number of carbon atoms=

1×25×6.022×10^23

=12.044×10^23 atoms.

hope it helps