Avogadro Number

Q.

Establish the relationship between vapour density and molecular mass of a gas by applying Avogadro’s law.

Q.

Number of oxygen atoms present in 1 gram of calcium carbonate are

1. 6 × 1021

2. 1.8 × 1022

3. 8 × 1022

4. 6 × 1022

Q.

The GAM of hydrogen is 1 g. How many grams of hydrogen gas contains avogadro number of molecules?

1. 1 g

2. 2 g

3. 3 g

4. 4 g

Q.

One mole of oxygen contains $6.023\times {10}^{10}$atoms of oxygen

1. True
2. False

Q. If Avogadro number $N_A,$ is changed from 6.022 $\times {10}^{23}mo{l}^{-1}$ to 6.022 $\times {10}^{20}mo{l}^{-1},$ this would change?

1. the ratio of chemical species to each other in a balanced equation.
2. the ratio of elements to each other in a compound.
3. the definition of mass in units of grams.
4. the mass of one mole of carbon.

Q.

An Avogadro number of molecules are present in ___.

1. 100 moles of a substance

2. 10 moles of a substance

3. 1 mole of a substance

4. 1000 moles of a substance

Q.

Which of the following term defines the number of atoms present in one molecule of an element?

1. Molecularity

2. Atomicity

3. Vapour density

4. Molecular mass

Q.

The symbol/symbols used to express Avogadro number is/are

1. ${\text{N}}_A$

2. ${\text{N}}_m$

3. ${\text{N}}_0$

4. ${\text{N}}_n$

Q. One mole of a substance contains $6.022\times {10}^{23}$ particles.

1. False
2. True