Question

an element X form an oxide on with formula H2O3 (
a) state the valency of x (b )write the formula of chloride of X and sulphate of x​

Answer 1

Hey buddy I think you have written the question wrong. It is 'an elementS form an oxide with formula X203 not H203

Here is your answer...

As the element is in the form of X203

Valence of X is 3

Chloride of X formula is XCl3

Sulphate of X formula is X2(So4)3