MEDIUM
9th CBSE
IMPORTANT
Earn 100

What is the mass in gram of 4 moles of nitrogen atom?

Important Questions on Atoms and Molecules

MEDIUM
9th CBSE
IMPORTANT
Calculate the number of iron atoms in a piece of iron weighing 8.4 g.
HARD
9th CBSE
IMPORTANT
Which of the following contains a greater number of atoms: a. 60 g Fe b. 60 g Al?( Atomic mass of Fe=56 u, atomic mass of Al=26.9 u)
MEDIUM
9th CBSE
IMPORTANT

Calculate the mass in gram of one atom of carbon.

HARD
9th CBSE
IMPORTANT
How many grams of neon has the same number of atoms as 8 g of calcium?
HARD
9th CBSE
IMPORTANT
The mass of 1 atom of an element A is 5.3×10-23g. What is its atomic mass? Give the symbol of this element.
MEDIUM
9th CBSE
IMPORTANT
Calculate the number of molecules present in a drop of trichloromethane (CHCI3) weighing 0.0239 g.
MEDIUM
9th CBSE
IMPORTANT
Calculate the mass in gram of 0.4 mole of water.
EASY
9th CBSE
IMPORTANT
How many moles of calcium carbonate are present in 20 g of the substance?