Question

Which contains more molecules: 340g of NH3 or 90g of H2O show your working!!

Answer 1

Answer:

Explanation:

The atomic weight of H2O is 18, 18g of water is 1 mole of H2O. 1 mole of any substance contains 6.023 x 10 23 number of atoms. The atomic weight of NH3 is 17 so 17g of NH3 contains 6.023 x 10 23 atoms. 340g of NH3 contains 20 moles of NH3.

90g of H2O is 5 moles of H2O, so there are 4 times as many molecules of NH3 as there are molecules of H2O.

The answer is NH3

Hope this helps

Answer 2

Answer:

atomic mass ( N =14 , H = 1×3 that means 14+3=17

340gram×17gram / mole

=5780mole

atomic mass ( H= 1×2 ,O= 16 =16+2 =18

90gram×18gram /mole

=1620mole

I think 340g ammonia (NH3)