Question

i need number of moles of oxygen molecules in 16mg is​

Answer 1

Answer:

1 Oxygen molecule conntain 2 oxygen atoms

so mass of 1 oxygen molecule is 32grams.

now given mass is 16mg which is ewual to 16 * 10^-3 g.

moles = given mass / molecular mass

16 * 10^-3 /32

1*10^-3/2

0.5 * 10^-3

5 *10^-4 moles........ Answer