Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 5

HARD

9th CBSE

IMPORTANT

Earn 100

Calculate the number of molecules of ${CH}_{4}$ in $80.0 g$ of it.

Important Questions on Atoms and Molecules

HARD

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 5

Calculate the mass of 1 molecule of NH₃.

HARD

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 5

Calculate the mass of

0.25

moles of calcium.

HARD

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>Revision Exercise>Q 5

Calculate the number of bromide ions in

0.2

mole of

{MgBr}_{2}

.

MEDIUM

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 1

Define atomic mass unit.

EASY

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 2

Give one example each of a trivalent cation and a trivalent anion.

EASY

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 3

What is the mass of 1 mole of water?

MEDIUM

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 4

Write the formula of a chemical compound formed by the

{Fe}^{3 +}

and

{SO}_{4}^{2 -}

ions.

MEDIUM

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 5

An element

X

has a valency of

3

. What is the formula of oxide of

X

?