Molecules

Q.

What is the molecular mass of Nitrogen?

Q.

Calculate the molar mass of ammonia.

Q.

What is the molecular mass of ${\mathrm{Na}}_2{\mathrm{SO}}_4$?

Q.

Calculate the molar mass of BaSO₄.

Q.

What is the molecular mass of toluene?

Q.

Calculate the molar mass of acetone?

Q.

What is the molecular mass of magnesium hydroxide?

Q. ___ is the smallest particle that is capable of existing independently and exhibits all the properties of the substance.

1. Atom
2. Molecule
3. Nucleus
4. Nucleon

Q.

Why cant we see atoms with naked eye?

Q.

Is CO₂ A Compound Or Molecule?

Q.

In carbon dioxide, the ratio of carbon atoms to oxygen atoms is always:

1. 1:2

2. 2:1

3. 3:2

4. 3:1

Q.

Calculate the molar mass of CH₄.

Q.

A balanced chemical equation is in accordance with law of _________?

Q.

Differentiate between:

Molecule and Radical.

Q.

A molecule exhibit all properties of matter

1. True
2. False

Q.

The smallest unit which has an independent existence and exhibits all the properties of the substance is called a/an ________ .

1. atom

2. radical

3. molecule

4. ion

Q.

Hydrogen chloride is a _____ made of $\text{H}$ and $\text{Cl}$ ____ .

1. Molecule, Cation and Anion.

2. Ion, Cation and Anion.

3. Element, Molecule and Molecule.

4. Molecule, Anion And Cation.

Q. Which of the following are molecules of elements?

1. Ozone
2. Nitrogen
3. Carbon monoxide
4. Water

Q.

Find the total number of molecules and atoms in the reactants:

$N_2+3H_2\to 2N{H}_3$

1. Molecules - 4

   Atoms - 8

2. Molecules - 8

   Atoms - 4

3. Molecules - 8

   Atoms - 8

4. Molecules - 6

   Atoms - 16

Q.

Calculate the molar mass of the sulfur molecule, ${\mathrm{S}}_8$.

Q. Correct the following statement:
A molecule of sulphur is monoatomic.

Q.

The mass ratio of hydrogen to oxygen in water is :

1. 1:8

2. 3:2

3. 2:3

4. 8:1

Q.

How will you calculate the molecular mass?

Q. is a molecule of a compound that is used regularly in our daily life.

1. $H_{2}O$
2. CO
3. Ar
4. $O_2$

Q.

7. Name the following compounds and also name the elements present in each of them. (You can ignore the numbers when naming these compounds.)

iv. $\mathrm{KCl}$

Q.

Illustrate the gram molecular mass.

Q. Which amongst the following gases can be classified as compound?

1. Hydrogen chloride
2. Oxygen
3. Nitrogen
4. Chlorine

Q. Calculate the molecular mass of water.

1. 18

Q.

Why should a chemical reaction always be balanced

Q. Which amongst the following pairs is not an example of molecule?

1. Oxygen gas and water
2. Sodium and potassium
3. Oxygen gas and ammonia
4. Hydrochloric acid and water