Question

how many atoms are there in 1.5dm^3 of O2 a) 7.5 ×10^22 b) 7.5× 10^23 please also give explanation​

Answer 1

Answer:

We know that 1L=1dm³

1.5dm³=1.5L of O2

22.4L O2 contains 6.022×10²³ atoms

1.5L O2 contains 6.022×10²³/22.4×1.5atoms=0.4032×10²³

This is your answer.But it cannot match with your options.