How many moles do $3 \mathrm{g}$ of water represent?

Important Questions on Basic Concepts Atoms & Molecules

EASY

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 2 - Basic Concepts Atoms & Molecules>QUESTIONS>Q 10

How many moles do $2 \mathrm{x} {10}^{22}$ molecules of hydrogen represent ?

EASY

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 2 - Basic Concepts Atoms & Molecules>QUESTIONS>Q 11

 A piece of copper weighs $0.635 \mathrm{g}$. How many atoms of copper does it contain?

EASY

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 2 - Basic Concepts Atoms & Molecules>QUESTIONS>Q 12

Between $1$gram of water and $1$ gram of methanol, which has more number of molecules ?

EASY

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 2 - Basic Concepts Atoms & Molecules>QUESTIONS>Q 13

What will be the weight of $1 \mathrm{x} {10}^{22}$ molecules of ammonia?
 

EASY

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 2 - Basic Concepts Atoms & Molecules>QUESTIONS>Q 14

What is the mass of $2.5 \mathrm{x} {10}^{23}$ atoms of nitrogen ?

EASY

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 2 - Basic Concepts Atoms & Molecules>QUESTIONS>Q 15

What is the mass of a carbon dioxide molecule?

EASY

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 2 - Basic Concepts Atoms & Molecules>QUESTIONS>Q 16

Calculate the number of molecules present in carbon dioxide gas weighing $4.4\mathrm{g}$.

EASY

11th Odisha Board

IMPORTANT

Bureau's Higher Secondary Chemistry Volume-1>Chapter 2 - Basic Concepts Atoms & Molecules>QUESTIONS>Q 17

Calculate the number of moles in$30 \mathrm{gms}$ of sodium hydroxide.