Avogadro's Number

Q. ​​​​​One mole of oxygen molecule has:

1. $12.04\times {10}^{23}$ atoms
2. $6.02\times {10}^{23}$ molecules
3. 32 g oxygen
4. $6.02\times {10}^{22{}^{}}\mathrm{molecules}$

Q. What is the mass of 0.5 mole of water molecules?

Q. Number of hydrogen molecules present in 3 moles of hydrogen is______.

1. $18.069\times {10}^{22}$
2. $18.069\times {10}^{23}$
3. $18.069\times {10}^{20}$
4. $18.069\times {10}^{21}$

Q. What is the mass of 0.5 mole of water molecules?

Q. The weight of one molecule of a compound of molecular formula $C_{60}{H}_{122}$ is:

1. $1.2\times {10}^{-20}g$
2. $5.025\times {10}^{-23}g$
3. $1.4\times {10}^{-21}g$
4. $6.023\times {10}^{-20}g$

Q. Total mass of $4.82\times {10}^{25}$ molecules of water is:

1. 1440.71 g
2. 3067.11 g
3. 963.21 g
4. 1235.71 g

Q. What is the number of oxygen atoms present in 126 g of ${HNO}_3$?

1. $36.132\times {10}^{23}$
2. $9.033\times {10}^{23}$
3. $120.44\times {10}^{23}$
4. $16.132\times {10}^{23}$

Q. Mass of 4.82 x ${10}^{25}$ molecules of $H_{2}O$ is approximately ____.

1. 1440 g
2. 1280 g
3. 160 g
4. 1600 g

Q.

Avogadro's Number is the no. of atoms present in ____ of Carbon C-12.

1. 12g (gram atomic weight)

2. 10g (gram atomic weight)

3. 1g (gram atomic weight)

4. 8g (gram atomic weight)

Q. what is the volume at stp of .85g of ammonia

Q. Number of hydrogen molecules present in 3 moles of hydrogen is______.

1. $18.069\times {10}^{22}$
2. $18.069\times {10}^{23}$
3. $18.069\times {10}^{20}$
4. $18.069\times {10}^{21}$

Q. Avogadro's number represents the number of atoms in 12 grams of carbon-12 isotope.

1. False
2. True

Q.

Which of the following statements is incorrect?

1. One mole of carbon contains Avogadros number of atoms.
2. One mole of oxygen gas contains Avogadro’s number of atoms.
3. One mole of neon contains Avogadro’s number of atoms.
4. Number of moles = $\frac{\mathrm{Given}\mathrm{mass}}{\mathrm{Gram}\mathrm{molecular}\mathrm{mass}}$

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

1. False
2. True

Q. What is the mass of one atom of neon if its gram atomic mass is 20 grams?

1. $2.65\times {10}^{-23}$ grams
2. $3.32\times {10}^{-23}$ grams
3. $5.32\times {10}^{-23}$ grams
4. $4.32\times {10}^{-23}$ grams

Q. Number of moles of oxygen atoms present in 360 mg of glucose is

Q. Hydrogen gas leaked out of a cylinder and only one gram of it was left. How many molecules are there in this one gram of hydrogen gas that is in constant random motion?

1. $3.011\times {10}^{23}$
2. $6.022\times {10}^{23}$
3. $9.033\times {10}^{23}$
4. $8.022\times {10}^{23}$

Q. Hydrogen gas leaked out of a cylinder and only one gram of it was left. How many molecules are there in this one gram of hydrogen gas that is in constant random motion?

1. $3.011\times {10}^{23}$
2. $6.022\times {10}^{23}$
3. $9.033\times {10}^{23}$
4. $8.022\times {10}^{23}$

Q. Mass of 4.82 x ${10}^{25}$ molecules of $H_{2}O$ is approximately ____.

1. 1440 g
2. 1280 g
3. 160 g
4. 1600 g

Q. Which one of the following is the true with respect to Avogadro's number?

1. It gives the number of particles in 1 mole of the substance
2. It is represented as N
3. The value of Avogadro's number is $6.023\times {10}^{23}$
4. The value of Avogadro's number remains constant

Q.

Avogadro's Number is the no. of atoms present in ____ of Carbon C-12.

1. 12g (gram atomic weight)

2. 10g (gram atomic weight)

3. 1g (gram atomic weight)

4. 8g (gram atomic weight)

Q. Total mass of $4.82\times {10}^{25}$ molecules of water is:

1. 1235.71 g
2. 3067.11 g
3. 1440.71 g
4. 963.21 g