Question

The mass of an atom of oxygen is 16.0 u. Express it in kg.

Answer 1

Given: mass of one atom oxygen is = 16.0 u

1 u = 1.66×10⁻²⁷ kg

∴ The mass of an atom of oxygen

= 16.0×1.66×10⁻²⁷

= 2.656×10⁻²⁶ kg

Answer 2

Answer:

2.6 ×10^-26

Explanation:

wt / Na...

= Na = avagadro number.....

= 16.0 / 6.023 × 10 ^-23

= 2.6 × 10 ^ -23 .....g

but u ask in kg ....right so....

so in kg...2.6 × 10 ^ -23 ×10 ^3

=2.6×10^-26....

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