How many oxygen atoms in 30 HNo3 molecules?

Answer 1

In every molecule of HNO3 there are 3 oxygens and you have 30 molecules so multiply 30 X 3 = 90 oxygen atoms in 30 molecules of nitric acid.

Answer 2

O2....Two atoms of oxygen in gaseous, natural form.

30 grams O2 (1 mole O2/32 grams)(6.022 X 10^23/1 mole O2)

= 5.65 X 10^23 atoms of oxygen

Answer 3

There are 90 oxygen atoms in 30 molecules of HNO3. Each molecule of HNO3 contains 3 oxygen atoms. Multiplying this by the number of molecules (30) gives a total of 90 oxygen atoms.