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
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.
Attachments:
Answered by
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
Similar questions