Question

if 12 gm of c12 has equal number of atoms as avogadros number what mass of 2he4 will contain same number of atoms:​

Answer 1

Answer: 4 grams

Explanation: According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}$

$\text{Number of moles}=\frac{12g}{12g/mol}=1mole$  

1 mole of $^{12}_6\textrm{C}$ contains= $6.023\times 10^{23}$ of atoms

Mass of 1 mole of Helium: 4 grams

$6.023\times 10^{23}$ of atoms are contained in 1 mole= 4 grams

Answer 2

According to avogadro's law, 1 mole of every substance weighs equal to the molecular mass and contains avogadro's number  of particles.

To calculate the moles, we use the equation:

 

1 mole of  contains=  of atoms

Mass of 1 mole of Helium: 4 grams

of atoms are contained in 1 mole= 4 grams