Home
Class 11
CHEMISTRY
Suppose the elements X and Y combine to ...

Suppose the elements X and Y combine to form two compounds `XY_2` and `X_3 Y_2` When 0.1 mole of `XY_2` weighs 10 g and 0.05 mole of `X_3 Y_2` weighs 9 g, the atomic weights of X and Y are

A

40,30

B

60,40

C

20,30

D

30,20

Text Solution

Verified by Experts

The correct Answer is:
A
Let atomic weight of element X is x and that of element Y is y.
for ` XY_2 , n = (w)/(Mol wt. ) implies 0.1 = (10)/( x+2 y)`
` x+ 2y = (10)/(0.1 ) = 100`
For ` X_3 Y_2 , n= ( w)/(Mol . W.t) implies 0.05 = (9)/(3x + 2y)`
` 3x + 2y = (9)/(0.05 ) = 180 `
On solving equations (i) and (ii), we get, y = 30
` x+ 2(30) = 100`
` 2=100 - 60 =40`
Promotional Banner

Similar Questions

Explore conceptually related problems

Suppose the elements P and Q combine to form two compounds PQ_(2) and P_(3)Q_(2) . When 0.1 mole of PQ_(2) weight 10 g and 0.05 mole of P_(3)Q_(2) weight 9 g, the atomic weights of P and Q are

Suppose the elements X and Y combine to form two compounds of XY_(2) and X_(3)Y_(2) . When 0.1 mole of XY_(2) weighs 10 g and 0.05 mole of X_(3)Y_(2) weighs 9 g , what are tha atomic masses of X and Y ?

Suppose elements X and Y combine to form two compounds XY_(2) and X_(3)Y_(2) when 0.1 mole of former weigh 10 g while 0.05 mole of the latter weigh 9g . What are the atomc weights of X and Y .

Suppose two elements X and Y combine to form two compiounds XY_(2) and X_(2)Y_(3) when 0.05 mole of XY_(2) weighs 5g while 3.011xx10^(23) molecules of X_(2)Y_(3) weighs 85g . The atomic masses of X and Y are respectively.

Elements A and B form two compounds B_2​A_3 and B_2​A . If 0.05 moles of B_2​A_3 weigh 9.0 g and 0.10 mole of B_2​A weigh 10 g, then atomic weight of A and B are :-