# A) An element 'X' has valency 3. Write its chemical formulae with sulphate ions. b) An element 'E' shows two valencies 2 & 4 .write the chemical formulae of the two oxides of 'E'. c) An element Y has valency one.Write its formula with carbonate ion.

2
by Swara111

2016-03-26T17:42:16+05:30

### This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
A) valancy of element X is 3 and  valency of sulphate ion is 2 as sulphate ion is SO4^2-
the chemical formula would be X2(SO4)2
B) valancy of oxide is 2 (O^2-)
if the valency of element E is 2
the chemical formula would be EO
if the valency of element E is 4
the chemical formula would be EO2
C) valency of element Y is 1
valency of carbonate ion (CO3^2-) is 2
the chemical formula would be Y2CO3
2016-03-26T22:01:56+05:30
A) X2(SO4)3

B) 1] EO {E->2}
2] E2O4 or EO2 {E->4}

C) Y2(CO3)