EASY
9th CBSE
IMPORTANT
Earn 100

What helps in determining the formula of an ionic compound? 

Important Questions on Atoms and Molecules

EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 30
What is meant by molar mass? 
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 31
Calculate the number of molecules in 8 g of O2?
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 32
Calculate the number of moles in 52 g of He(Helium). [Atomic mass; O=16 u, He=4 u]
MEDIUM
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 33
Give postulates of Dalton's atomic theory.
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 34

Write the chemical formula using criss-cross method.

Ammonium sulphate

EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 34

Write the chemical formula using criss-cross method. 

Magnesium bicarbonate

EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 34

Write chemical formula using criss-cross method.

Barium nitrate

EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 35
Define the term 'molecular mass'.