Full Marks Science>Chapter 3 - Atoms and Molecules>TEST YOUR SKILLS>Q 9

MEDIUM

9th CBSE

IMPORTANT

Earn 100

Explain the difference between $O_{2}$ and $2 O$ .

Important Questions on Atoms and Molecules

MEDIUM

9th CBSE

IMPORTANT

Full Marks Science>Chapter 3 - Atoms and Molecules>TEST YOUR SKILLS>Q 10

What is formula unit mass? How is it different from molecular mass?

MEDIUM

9th CBSE

IMPORTANT

Full Marks Science>Chapter 3 - Atoms and Molecules>TEST YOUR SKILLS>Q 11

State the difference between sodium atom and sodium ion.

HARD

9th CBSE

IMPORTANT

Full Marks Science>Chapter 3 - Atoms and Molecules>TEST YOUR SKILLS>Q 12

The mass of one atom of chlorine is _____ $\times 10^{- 23} gms$ . Avogadro number is $6.023 \times 10^{23}$ .

(Write the value with four significant figures)

MEDIUM

9th CBSE

IMPORTANT

Full Marks Science>Chapter 3 - Atoms and Molecules>TEST YOUR SKILLS>Q 13

Calculate the mass of one molecule of chlorine. (Give your answer in unified atomic mass unit) (Atomic weight of chlorine is

35.5 u

)

MEDIUM

9th CBSE

IMPORTANT

Full Marks Science>Chapter 3 - Atoms and Molecules>TEST YOUR SKILLS>Q 14

Calculate the mass of one mole of chlorine gas in grams. (

17 / 35.5 / 71

)

HARD

9th CBSE

IMPORTANT

Full Marks Science>Chapter 3 - Atoms and Molecules>TEST YOUR SKILLS>Q 15

With the help of an activity prove the law of conservation of mass.