Question

A balloon contains 0.02 g of H2 gas. It contains how
many H2 molecules?
(a) 6.02 x 1023
(b) 3.01 X 1022
(c) 6.02 X 1024
(d) 3.01 X 1024
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Answer 1

Answer:

I think (d) part is right answer. ...

Answer 2

Dear Yahya,

◆ Answer -

N = 6.022×10^21 molecules

● Explanation -

# Given -

W = 0.02 g

M = 2 g/mol

# Solution -

Number of moles of H2 present in the balloon is calculated by -

n = W / M

n = 0.02 / 2

n = 0.01 mol

Number of molecules of H2 present in the balloon is calculated by -

N = n × NA

N = 0.01 × 6.022×10^23

N = 6.022×10^21 molecules

Therefore, 6.022×10^21 molecules of H2 are present in the balloon.

Hope this is helpful..