Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 6

EASY

9th CBSE

IMPORTANT

Earn 100

Define a mole. What are the two things that a mole represents?

Important Questions on Atoms and Molecules

EASY

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 7

Carbon and oxygen combine in the ratio of

3 : 8

by mass to form carbon dioxide. What mass of oxygen will be required to combine completely with

12 g

of carbon?

HARD

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 8

Calculate the mass of one molecule of carbon dioxide.

HARD

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 9

Define the law of conservation of mass. Which postulate of Dalton's atomic theory is the basis of this law?

MEDIUM

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 10

Write the formula of aluminium sulphate. Calculate its formula unit mass.

MEDIUM

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 11

Calculate the number of atoms in

16 u

of

He

.

MEDIUM

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 11

Calculate the number of atoms in

16 g

of

He

.

HARD

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 11

Calculate the number of atoms in 16 moles of He.

EASY

9th CBSE

IMPORTANT

Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 3 - Atoms and Molecules>TEST YOURSELF>Q 12

Define: Atomic mass