Question

help me guys. ...pls ....​

Answer 1

Answer:

a) Na2 Co3.10h20

=na=2

=co=3

=h=10

=o=10*1=1

b)h2so4

=h=2

s=1

o=4

c)caco3

ca=1

co=3

Answer 2

Answer:

hi it's 8:16 in korea so i said gn..........