Question

calculate the volume of 32g of oxygen molecules at STP(atomic mass of Oxygen=16)​

Answer 1

Answer:

Molecular weight of oxygen is 32.

Thus the number of moles present in 16 g of O

2

will be 0.5

Number of molecules present will be 0.5N

A

Number of gram atoms will be 0.5×2N

A

=N

A

( Since one molecule of oxygen contains 2 atoms of oxygen)

1 mol of a gas occupies 22.4l at STP, thus given sample will occupy 11.2l at STP.

No. of protons=No.of gram atoms×8=8N

A

(Since one oxygen atom contains 8 protons)

Answer 2

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