Question

Hii = _= ,
Calculate the molecular mass of Na2CO3 .

Quality answer .​

Answer 1

--> WE KNOW THAT,

=> MASS OF SODIUM (Na) = 23 u

=> MASS OF CARBON (C) = 12 u

=> MASS OF OXYGEN (O) = 16 u

--> SO , MOLECULAR MASS OF NA2CO3 WILL BE :

=> 23×2 u + 12 u + 16×3 u

=> 46 u + 12 u + 48 u

=> 106 u

=> HENCE THE MOLECULAR MASS OF NA2CO3 IS 106 u .

'U' HERE IS THE UNIFIED MASS.

Answer 2

Answer:

Hey there!

A correction in your question

" calculate the Formula unit mass of Na2Co3 10 H2O "

================================

Formula unit mass is the sum of atomic masses of all elements in a ionic compound

Na2Co3. 10 H2O ➡ Washing soda

Atomic weights:

Na=23

C=12

O=16

H=1

H2O=18 

Na2 = 46 

CO3 = 60 

10H2O = 180 

Formula Unit mass =23*2+2*6+3*16 +10(18)

=46+12+48+180

=106+180

=286

hope helped!