Question

If in place of C-12 atom, O-16 atom was used to find the relative atomic mass of other

elements by dividing oxygen (O-16) atom into sixteen equal parts, would the mass of hydrogen

atom change? Justify.


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Answer 1

Explanation:

ANSWER

Remain unchanged.

This is because when you consider 1/6 in place of 1/12, since mass of carbon atom is still the same, new amu1 = 2amu ( where amu1 is new amu unit and amu is old amu unit)

So now

N

A

1 (avogadro’s number) becomes half ( N/2) since the weight of carbon corresponding to atomic weight becomes 6 gm in place of 12.( where N

A

1 is new avogardo’s number and N

A

is old avogardro’s number)

And we know that mass of one mole of substance is=N

A

×amu

So new atomic mass =N

A

1×amu 1=N

A

2×2 amu=N

A

×amu=old atomic weight.

The mass would nt change of h