HARD
9th CBSE
IMPORTANT
Earn 100

Calculate the ratio of the number of molecules in 32g of oxygen and 8g of hydrogen.

Important Questions on Atoms and Molecules

HARD
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Numerical On Mole And Its Role>Q 2
Find the ratio of number of molecules in 2g of O2 and 7g of N2.
HARD
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Numerical On Mole And Its Role>Q 3
Ratio of the mass of a sulphur atom to that of an oxygen atom is 2:1. If the atomic mass of O is 16u, find the atomic mass of S.
HARD
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Numerical On Mole And Its Role>Q 4
Compute the number of O atoms in 54g of water. M(H2O) = 18 g/mol.
EASY
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Numerical On Mole And Its Role>Q 5
A vessel contains 5.6 g of nitrogen (N2) gas. Calculate the following quantities if the molar mass of N atoms is 14 g/mol.
Moles of (N2).
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Numerical On Mole And Its Role>Q 5
A vessel contains 5.6 g of nitrogen (N2) gas. Calculate the following quantities if the molar mass of N atoms is 14 g/mol.
The number of N2 molecules.
MEDIUM
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Numerical On Mole And Its Role>Q 5

A vessel contains 5.6 g of nitrogen N2 gas. Calculate the following quantities if the molar mass of N atoms is 14 g/mol:

Number of N atoms.

HARD
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Numerical On Mole And Its Role>Q 6
You are asked to buy your chemistry teacher to buy 5 moles of distilled water from the medical store where small bottles each containing 10mL(=10g) distilled water are available. How many such bottles would you buy?
HARD
9th CBSE
IMPORTANT
Secondary Chemistry>Chapter 3 - Atoms and Molecules>Numerical On Mole And Its Role>Q 7
How many Ag atoms are there in 0.0001g of silver? Molar mass of Ag is 108g/mol.