Question

5. What mass of nitrogen, N2, will contain the same number of

molecules as 1.8 g of water, H2O ? (Atomic masses : N = 14 u ; H = 1 u ;

O = 16 u)​

Answer 1

Answer:

Molar mass of H2O = 18 g

Mole = 1.8/18

= 0.1

Molecules = 0.1*6.022*10^23

= 0.6022*10^23

= 6.022*10^22 molecules of H20

Now,

Molar mass of N2 = 28 g

Mole = x/28

Molecules = Mole*Avogadro's Number

= 6.022*10^22 = x/28*6.022*10^23

= x = 2.8 g

Hope this helps.

Answer 2

Answer:

Explanation:

Molar mass of H2O = 18 g

Mole = 1.8/18

= 0.1

Molecules = 0.1*6.022*10^23

= 0.6022*10^23

= 6.022*10^22 molecules of H20

Now,

Molar mass of N2 = 28 g

Mole = x/28

Molecules = Mole*Avogadro's Number

= 6.022*10^22 = x/28*6.022*10^23

= x = 2.8 g