Question

calculate the molecular mass of 1- Na
2co3 .
2-Naco3
​

Answer 1

Na=22u

Co3=6+16×3=6+48=54u

NaCo3=22+54=76u

hope this help u

Answer 2

We know that ,

Molar mass of Na =23u

Molar mass of C=12u

Molar mass of O=16u

Therefore,

1-mass of Na2CO3=( 2×23)+12+(3×16)

=46+12+48

=96u

2- mass of NaCO3 = 23+12+(3×16)

=23+12+48=83u

Hope it helps...