Question

THE WEIGHT OF CARBONDIOXIDE CONTAINING SAME NUMBER OF ATOMS ASIN 4.4 GRAMS OF NITROUSOXIDE

Answer 1

The molar mass of water is 18g. Thus, there are 6.022 X 10^23 molecules of H2O in 18g of H2O. ——————{Avogadro’s constant is 6.022 X 10^23}

So

18g of H2O = 6.022 X 10^23 molecules of H2O

1g of H2O = (6.022 X 10^23 / 18) molecules of H2O

7.2g of H2O = (6.022 X 10^23 X 7.2) / 18 molecules of H2O

= 2.408 X 10^23 molecules of H2O

Thus, there are 2.408 X 10^23 molecules of H2O in 180g of H2O.

Now, the molar mass of carbon dioxide (CO2) is 44g. Thus, there are 6.022 X 10^23 molecules of CO2 in 44g of CO2. So

mass of 6.022 X 10^23 molecules of CO2 = 44g

mass of 1 molecule of CO2 = 44 / (6.022 X 10^23) g

So, mass of 2.408 X 10^23 molecules of CO2 =

(44 X 2.408 X 10^23) / (6.022 X 10^23) g of CO2

= 17.59g of CO2

Hence, 17.59g mass of CO2 contain the same number of molecules as present in 7.2G of H2O