Question

in compound XY. 3?5 grams of X reacts with 10.5 grams of Y. find the % of tha X and Y and any elements respectively.​

Answer 1

Answer:

Let x and y be the atomic weights of X and Y

Given 0.1 mole of xy^2, weighs 10 kg

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11th

Chemistry

Structure of Atom

Atomic Number and Mass Number

Suppose the elements X and ...

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Asked on December 20, 2019 by

Sanjitha Prakashini

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 10g and 0.05 mole of X

3

Y

2

weighs 9g, the atomic weights of X and Y are:

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ANSWER

Let x and y be the atomic weights of X and Y

Given 0.1 mole of XY

2

weighs 10g

⇒x+2y=

0.1

10

=100⟶(1)

0.05 mole of X

3

Y

2

weighs 9g

⇒3x+2y=

0.05

9

=180⟶(2)

(1)⇒x=100−2y

Substituting for x in Equation (2)

⇒3(100−2y)+2y=180

⇒300−6y+2y=180

⇒y=30

Hence x=100−2(30)=40

Explanation:

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