MEDIUM
9th CBSE
IMPORTANT
Earn 100

Calculate the mass in gram of one atom of carbon.

Important Questions on Atoms and Molecules

HARD
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 10
How many grams of neon has the same number of atoms as 8 g of calcium?
HARD
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 11
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
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 12
Calculate the number of molecules present in a drop of trichloromethane (CHCI3) weighing 0.0239 g.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 13
Calculate the mass in gram of 0.4 mole of water.
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 14
How many moles of calcium carbonate are present in 20 g of the substance?
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 15
Calculate the mass of one molecule of nitrogen in gram.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 16

Calculate the number of water molecules contained in a drop of water weighing 0.05 g.

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 17
Find the ratio by mass of the elements present in a molecule of phosphine (PH3).