Question

Find the correct answer​

Answer 1

EXPLANATION:-

SOLUTIONS :-

1) 8g of O₂

No.of moles (n) = Given mass / Molecular weight

As we know that ,

O₂ Molecular weight is 32

Given mass is 8g

So,

No.of moles = 8/32

No.of moles = 1/4

= 0.25 moles

So, 8 g of O₂ is 0.25 moles

1 (c)

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2)

52g of He

Helium(He) Molecular weight is 4 g

Given mass = 52g

So,

No.of moles = Given mass/Molecular weight

= 52/4

= 13 moles

So, 52g of He is 13 moles

2 (a)

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3) 112 grams of N₂

As we know that Molecular weight of N₂ is 28 g

Given mass is 112g

So,

No.of moles = Given mass/Molecular weight

= 112/28

= 56/14

= 28/7

= 4 moles

So, 112g of N₂ is 4 moles

3 (d)

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4) 35.5 g of Cl₂

As we know that Molecular weight of Cl₂ is 71 g

Given mass 35.5 g

So,

No.of moles = Given mass/Molecular weight

= 35.5/71

= 35.5/35.5×2

= 1/2

= 0.5 moles

4 (b)

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1) c 2) a 3) d 4) b

So, the correct option is (B)