Chemistry, asked by shreyassamarth431544, 11 months ago

Two elements X and Y combine together to form two different compounds XY2 and X2Y3 . if 0.05 mole of XY2 has a mass of 5g and 0.05 mole of X2Y3 has a mass of 85g. Calculate atomic mass of X and Y ????​

Answers

Answered by omsamarth4315
9

Answer:

➡️ atomic weight of element X = x

➡️ atomic weight of element Y = y

➡️ XY2 = x+2y

➡️ X2Y3 = 2x + 3y

for XY2 , 0.05 = 5 / x+2y ________(1)

for X2Y3 , 0.5 = 85 / 2x + 3y ______(2)

y = 30

putting the value of y in equation (1) ,

x = 40

for more information, refer to the attachment.

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Answered by Anonymous
3

Answer:

X + Y → XY2

0.05 mole = 5 gms

1 mole = 50.05 = 100 gm

X + 2Y = 100 gm

X =100 − 2Y.......(1)

Second equation,

X + Y → X2Y3

3.011 × 1023 molecules = 85 gm6.022 × 1023 molecules = 170 gm1 mole = 170 gm

2X + 3Y = 170

Substituting the value of X form equation 1,

2 (100− 2Y) + 3Y = 170200 − 4Y +3Y = 170Y = 200− 170Y=30 gm

Substituting the value of Y, we get,

2X + 3(30) = 1702X = 170−902X = 80X= 40 gm

Thus, atomic mass of X = 40 gm and atomic mass of Y = 30 gm

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