Calculate the molar mass of ethene, ${\mathrm{C}}_2{\mathrm{H}}_4$.

Important Questions on Atoms and Molecules

MEDIUM

9th CBSE

IMPORTANT

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

Calculate the mass of $5$ mol of $\mathrm{Al}$ atoms.

MEDIUM

9th CBSE

IMPORTANT

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

Calculate the mass of $0.2$ mol atom of oxygen.

MEDIUM

9th CBSE

IMPORTANT

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

Calculate the mass of $1.5$ mole of ${\mathrm{Na}}^{+}$ ion.

MEDIUM

9th CBSE

IMPORTANT

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

Calculate the mass of $0.5$ mol molecule of water.

HARD

9th CBSE

IMPORTANT

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

What is mole? Convert the following into mole:
(i)$27 \mathrm{g}$ of ${\mathrm{H}}_2\mathrm{O}$.
(ii) $22 \mathrm{g}$ of ${\mathrm{CO}}_2$.
(ii)$12 \mathrm{g}$ of ${\mathrm{O}}_2$.
 

EASY

9th CBSE

IMPORTANT

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

Write the molecular formula of ammonia and give the ratio by mass of atoms present.

EASY

9th CBSE

IMPORTANT

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

Write the molecular formula of water and give the ratio by mass of atoms present.

EASY

9th CBSE

IMPORTANT

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

Write the molecular formula of carbon dioxide and give the ratio by mass of atoms present.