Question

16 gm CH4 is added to 18 gm of water. How many atoms are there in the mixture?
(NA = Avogadro number.)
10NA
11NA
16NA
8NA​

Answer 1

Answer:

8

Explanation:

16gm of ch4=1mole of ch4=1NA of CH4 molecules

1NA of CH4 molecules contain (1NA of C atoms) and (4NA of H atoms)

18gm of H20=1 mole of H20=1NA of H20 molecules

1NA of H20 molecules contain (2NA of H atoms) and (1 NA of O atoms)

If you add all atoms present in this system then answer will be 8NA