`6xx10^(-3)` mole `K_(2)Cr_(2) C_(7)` reacts completely with `9xx10^(-3)` mole `X^(n+)` to give `XO_(3)^(-)` and `Cr^(3+)`. The value of `n` is `:`

6 xx 10^(-3) mole K_2 Cr_2 O_7 reacts completely with 9 xx 10^(-3) mole X^(n+) to given XO_3^- and Cr_^(3+) . The value of n is :

6 xx 10^(-3) mole K_2 Cr_2 O_7 reacts completely with 9 xx 10^(-3) mole X^(n+) to given XO_3^- and Cr_^(3+) . The value of n is :

6x 10^(-3) mole K_2Cr_2O_7 reacts completely with 9x 10^(-3) mole X^(n+) to give XO_3^(-1) and Cr^(3+) . the value of n is :

If 3^(6)xx9^(2)=3^(n)xx3^(2) , then value of n is

A 2.18 g sample contains a mixture of XO and X_(2)O_(3) . It reacts with 0.015 moles of K_(2)Cr_(2)O_(7) to oxidize the sample completely to form XO_(4)^(-) " and " Cr^(3+) . If 0.0187 mole of XO_(4)^(-) is formed , what is the atomic mass of X ?

A sample weighing 2.198 g containing a mixture of AO and A_(2)O_(3) takes 0.015 "mole of" K_(2)Cr_(2)O_(7) to oxidise the sample completely to form AO_(4)^(-) and Cr^(3+) . If 0.0187 "mole of" AO_(4)^(-) is formed, what is at.wt . of A ?