Question

number of O-atom in 2×10-3 molAl(NO3)3
please answer it is very urgent ​

Answer 1

Answer:

In 1 formula unit of Al(NO3)3, there are (clearly!) 9 atoms of oxygen, 3 nitrogen atoms, and 1 aluminum atom. I have gone on before that the mole (NA, Avogadro's number) is simply a much larger number, i.e. NA = 6.022×1023.

So, in 1 mole of Al(NO3)3 there are (9 × NA) O atoms precisely. What is the mass of 1 mol Al(NO3)3