Question

Fifty grams of which of the following substances contains the greatest number of moles? (J Sodium carbonate Magnesium chloride Hydrogen gas​

Answer 1

Answer:

Hydrogen gas

Explanation:

50/2 = 25 moles

Answer 2

To find the number of moles, we divide Given Mass by the molar mass.

Given Mass = 50 gm.

Molar mass of  Na₂ Co₃= $105.9888 g/mol$

No of moles = Given Mass / molar mass.

No of moles = 50 / 105.988

No of moles =0.4

Molar mass MgCl₂ = $95.211 g/mol .$

Given Mass = 50 gm.

No of moles = 50 / 95.122

No of moles= 0.525651

Given Mass = 50 gm.

Molar mass of H₂ = 2

No of moles = Given Mass / molar mass.

No of moles= $\frac{50}{2}$ = $25$

Ans :-  Hydrogen gas​ contains the greatest number of moles and that is 25.