LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 7

EASY

9th CBSE

IMPORTANT

Earn 100

A compound's chemical formula is ${Fe}_{2} O_{3}$ . Name the elements present in this compound. Name the compound represented by this formula.

Important Questions on Atoms and Molecules

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 8

Write the atomicity of the following molecules:
a.

{NH}_{3}

b.

{SiH}_{4}

c.

{NO}_{2}

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 9

How does molecular formula differ from empirical formula?

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 10

How are empirical formula and molecular formula related?

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 11

Write down the names of compounds represented by the formulae:
a.

{Al}_{2} {({SO}_{4})}_{3}

b.

{CaCI}_{2}

c.

K_{2} {SO}_{4}

d.

{KNO}_{3}

e.

{CaCO}_{3}

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 1

Calculate the molecular mass of nitric acid

({HNO}_{3})

.

EASY

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 1

Calculate the molecular mass of sulphur dioxide (

{SO}_{2}

).

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 1

Calculate the molecular mass of urea

({NH}_{2} {CONH}_{2})

.

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>CHECK YOUR PROGRESS>Q 1

Calculate the molecular mass of glucose

(C_{6} H_{12} O_{6})

.