Question

Calculate the mass of 12.044×10^15 molecules of oxygen o2

Answer 1

Hi, please consider the answer given below;

In this case you need to know that oxygen molecules has a mass of 32 g/mole

Then we can say that If 6.023 x 10^23 oxygen molecules have a mass of 32 grams.

Then 12.044 × 10^15 will have a mass of;

(12.044 × 10^15) x 32/(6.023 x 10^23) = 6.40 x 10^-7