Calculate the mass of $0.1$ mol of ${\mathrm{KNO}}_3$. 

Important Questions on Atoms and Molecules

HARD

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 7

Calculate the number of atoms of each type in $5.3 \mathrm{g}$ of ${\mathrm{Na}}_2{\mathrm{CO}}_3$.

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 8

Calculate the mass of $3.0$ moles of ${\mathrm{CO}}_2$.

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 8

Calculate the mass of $0.2$ moles of ${\mathrm{NH}}_3$.

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 9

Calculate the mass of $1$ atomic mass unit in gram.

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 10

Calculate the mass of $1$ molecule of ammonia.

MEDIUM

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 10

Calculate the mass of $1$ molecule of oxygen.

HARD

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 11

Which of the following weighs the most: 
a. $56$ g of iron 
b. $1\times {10}^{23}$atoms of carbon 
c. $0.1$ gram-atom of silver 
d. $5$ gram-atom of nitrogen?
 

HARD

9th CBSE

IMPORTANT

LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 12

Calculate the mass of nitrogen which contains the same number of molecules as are contained in $4.4 \mathrm{g}$ of carbon dioxide.