MEDIUM
9th CBSE
IMPORTANT
Earn 100

Calculate the number of Na atoms in 0.2 mol of sodium.

Important Questions on Atoms and Molecules

EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 5
A dozen of pencils is a collection of _____ pencils. (6 / 12
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 5
The unit _____ is used to report the amount of chemical substances.
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 5
The numerical value of Avogadro number is  6.022× 10n. The value of n is _____.
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 5
Number of moles of Cl atoms in one mole of CCl4 is _____.
HARD
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 5
Mass of 0.2 mol of carbon is _____ grams. (Atomic mass of carbon is 12 u)
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 5
The molar mass of C atom is _____ g/mol.
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 5
The number of molecules in 32 g of oxygen is _____×1023.6.022/6.625
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Problems for Proficiency>Q 5
The number of moles in 36 grams of water (H2O) is _____. (one / two / three)