Question

46. If the mass ratio of He to N, in a container is2:1 then the ratio of their moles will be(1) 2:18 (2) 4:1(3) 7:1ST 14:1​

Answer 1

Answer:

Molar Mass of Helium = 4 g

Molar Mass of Nitrogen = 14 g

Ratio of given masses of Helium to Nitrogen = 2 : 1

Let the given masses be 2x and x respectively. This implies,

⇒ No of moles of Helium = 2x / 4 = x / 2

⇒ No of moles of Nitrogen = x / 14

Ratio of No of moles of Helium to that of Nitrogen is given as:

⇒ ( x/2 ) : ( x/14 )

⇒ 14 : 2 = 7 : 1

Therefore Option (3) is correct.

Answer 2

Answer:

7:1

Explanation:

molecular mass of He is 4 and mass of N is 14

so, moles= given weight/ molecular mass