Question

20 g of hydrogen is present in 5 litre vessel. the molar concentration of hydrogen is?

Answer 1

Answer:

2 mol/L

Explanation:

Molecular mass of Hydrogen (M) = 2g/mol

Given mass of Hydrogen(m) = 20g

Given volume of vessel (V) = 5L

Number of moles of Hydrogen present(n)

= Given mass/Molecular mass

=20/2

=10 moles

Molar concentration

= Number of moles/Volume(in litres)

= n/V

= 10/5

= 2 mol/L