Question

36. An element 'X' forms two compounds 'A' and
'B'. The percentage by weight of element X
in each compound was determined, which are
given below:
Compounds Percentage of X Molecular
weight
A
50 %
114
B
50 %
152
Calculate the maximum possible value of
atomic weight of element X.
(a) 23
(b) 19
(c) 39
(d) 27​

Answer 1

Explanation:

Let mass of compound = 100 gm

Then mass of X = 50 gm

Then mass of Y = 50 gm

Mole of X =

10

50

= 5

Mole of Y =

20

50

= 2.5

Molecular formula = X

5

Y

2.5

=X

2

Y