Question

Answer the question, don't spam.​

Answer 1

Answer:

Zno = 81 u

$Na_{2}O$ = 62 u

$K_{2}CO_{3}$ = 138 u

Step-by-step explanation:

Given atomic masses=

Zn=65 u              Na= 23 u             K=39 u          C=12 u           O=16 u

So, molecular mass of ZnO=

=65 + 16

=81 u

Molecular mass of $Na_{2}O$ =

=2×(23) + 16

=46 + 16

=62 u

Molecular mass of $K_{2}CO_{3}$ =

=2×(39) + 12 + 3×(16)

=78 + 12 + 48

=138 u