Suppose the elements X and Y combine to form two compounds $X Y_{2}$ and $X_{3} Y_{2}$ . When 0.1 mole of $X Y_{2}$ weighs 10 g and 0.05 mole of $X_{3} Y_{2}$ weighs 9 g, the atomic weights of X and Y are :

Question

Suppose the elements X and Y combine to form two compounds

X Y_{2}

and

X_{3} Y_{2}

. When 0.1 mole of

X Y_{2}

weighs 10 g and 0.05 mole of

X_{3} Y_{2}

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

Toppr Admin · Accepted Answer

NXY2-0-1-10AX-2AYAX-2AY-100-xA0-xA0-xA0-xA0-xA0- - -equation 1-nX3Y2-0-05-93AX-2AY3AX-2AY-180-xA0-xA0-xA0-xA0- - -equation 2-On solving equation 1 and 2 we get-AX-40-AY-30

Suppose the elements X and Y combine to form two compounds $X Y_{2}$ and $X_{3} Y_{2}$ . When 0.1 mole of $X Y_{2}$ weighs 10 g and 0.05 mole of $X_{3} Y_{2}$ weighs 9 g, the atomic weights of X and Y are :
20, 30
60, 40
40, 30
30, 20

$n_{X Y_{2}} = 0.1 = \frac{10}{A_{X} + 2 A_{Y}}$

$A_{X} + 2 A_{Y} = 100$ ... (equation 1)

$n_{X_{3} Y_{2}} = 0.05 = \frac{9}{3 A_{X} + 2 A_{Y}}$

$3 A_{X} + 2 A_{Y} = 180$ ... (equation 2)

On solving equation 1 and 2 we get,
$A_{X} = 40, A_{Y} = 30$

Suppose the elements X and Y combine to form two compounds XY2 and X3Y2. When 0.1 mole of XY2 weighs 10 g and 0.05 mole of X3Y2 weighs 9 g, the atomic weights of X and Y are :20, 3060, 4040, 3030, 20

nXY2=0.1=10AX+2AYAX+2AY=100 ... (equation 1)nX3Y2=0.05=93AX+2AY3AX+2AY=180 ... (equation 2)On solving equation 1 and 2 we get,AX=40,AY=30

Suppose the elements X and Y combine to form two compounds $X Y_{2}$ and $X_{3} Y_{2}$ . When 0.1 mole of $X Y_{2}$ weighs 10 g and 0.05 mole of $X_{3} Y_{2}$ weighs 9 g, the atomic weights of X and Y are :
20, 30
60, 40
40, 30
30, 20

$n_{X Y_{2}} = 0.1 = \frac{10}{A_{X} + 2 A_{Y}}$

$A_{X} + 2 A_{Y} = 100$ ... (equation 1)

$n_{X_{3} Y_{2}} = 0.05 = \frac{9}{3 A_{X} + 2 A_{Y}}$

$3 A_{X} + 2 A_{Y} = 180$ ... (equation 2)

On solving equation 1 and 2 we get,
$A_{X} = 40, A_{Y} = 30$