HARD
9th CBSE
IMPORTANT
Earn 100

What is the number of H2O molecules in 1 drop of water which weighs 0.06g?

Important Questions on Atoms and Molecules

HARD
9th CBSE
IMPORTANT
The molar mass of O atoms is 16g/mol. What is the mass of oxygen atom?
HARD
9th CBSE
IMPORTANT
The amount of 4.4g substance X is reported to be 0.1 mol. What is its molar mass.
HARD
9th CBSE
IMPORTANT
What mass of oxygen will contain 2 moles of O2 molecules? Molar mass of O2 = 32g/mol.
HARD
9th CBSE
IMPORTANT

Calculate the number of molecules in 1.195g of chloroformCHCl3.

Atomic masses. H=1u, C=12u, Cl=35.5u

HARD
9th CBSE
IMPORTANT
Calculate the mass of one billion molecules of water. MH2O = 18g/mol.
HARD
9th CBSE
IMPORTANT
Calculate the amount of moles in 6g of carbon.
HARD
9th CBSE
IMPORTANT
Calculate the amount of moles in 9.9g of H2O.
HARD
9th CBSE
IMPORTANT
Calculate the amount of moles in 9.8g H2SO4.