Secondary Chemistry>Chapter 3 - Atoms and Molecules>Numerical On Mole And Its Role>Q 3

HARD

9th CBSE

IMPORTANT

Earn 100

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.

Important Questions on Atoms and Molecules

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(

H_{2} O

) = 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

(N_{2})

gas. Calculate the following quantities if the molar mass of

N

atoms is

14

g/mol.
Moles of

(N_{2})

.

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

(N_{2})

gas. Calculate the following quantities if the molar mass of

N

atoms is

14 g / mol

.
The number of

N_{2}

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 $N_{2}$ gas. Calculate the following quantities if the molar mass of $N$ atoms is $14 g / m o l$ :

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.

HARD

9th CBSE

IMPORTANT

Secondary Chemistry>Chapter 3 - Atoms and Molecules>Numerical On Mole And Its Role>Q 8

How many moles of hydrogen atoms are there in one mole of water

(H_{2} O)

? What is the total number of H atoms in one mole

H_{2} O

.

HARD

9th CBSE

IMPORTANT

Secondary Chemistry>Chapter 3 - Atoms and Molecules>Numerical On Mole And Its Role>Q 9

What is the number of

H_{2} O

molecules in 1 drop of water which weighs 0.06g?