Question

Calculate the mass of oxygen in grams present in 0.1 mole of Na2CO3.10H20​

Answer 1

Answer:-

Oxygen has molar mass of 16.

Oxygen amount in Na2CO3.10H2O is 10 O+ 3 O

13 Oxygen atoms.

13*16= 208.

So 1 Mole of Na2CO3.10H2O has 208 gms of oxygen atoms. But 0.1 Mole has 20.8 gms of oxygen

Calculate Na2CO3*10H2O molar weight

•Na (sodium ) has molar mass of 23.

•C (carbon) has molar mass 12

•O(oxygen) has 16 and hydrogen(H) has 1

Now calculate molar mass =

23*2+ 12+ 3*16 + 10(1*2+ 16)

46+12+48+180

=286 Ans

Hope it will help you :)