Question

3×10 to the power of 25 atoms of an element weigh 800g if this element is available as triatomic Gas , the molar mass of the gas is :

Answer 1

Answer:

48.159g/mol or 48.16g/mol

Explanation:

3×10^25 atoms weigh 800g

1 atom wiegh=800/3×10^25g

mass of 1 mol of atom

=800/3×10^25 × 6.02×10^23

mass of 1mol gas is

16.05 g/mol since it is the molar mass

as we know mass of 1 mol of a substance is its

molar mass so molar mass of 1 atom of gas is

16.053g/mol. the atomicity of the gas is 3

given triatomic

so molar mass of 3 atoms of gas is

16.053×3=48.159=48.16g/mol