Question

An element ‘X; forms an oxide with formula ‘X2O3.
(i) State the valency of ‘X’.
(ii) Write the formula of chloride and sulphate of ‘X’.
(b) Calculate the number of moles in 34 g of NH3.
[Given atomic mass of N=14 u; H=1 u].

Answer 1

1) valency = 3
3) XCl3
X2SO43