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Chemistry

Grade-9

Easy

Question

A metal ‘A’ of equivalent mass E forms an oxide of molecular formula A_xO_y. The atomic mass of the metal is given by the _________ equation.

$2 E (\frac{y}{x})$
y/x
x/y
2xy

hint Hint:

xA + y/2O₂ $rightwards arrow$ A_xO_y

The correct answer is: $2 E open parentheses y over x close parentheses$

Metal oxide A_xO_y, atomic mass of A is M
xA + y/2O₂ $rightwards arrow$ A_xO_y

y/2 $cross times$ 32 $rightwards arrow for blank of$ xM g of metal A
E = 8g O₂ $rightwards arrow for blank of$ xM/2y g of A
$therefore$ M = 2E(y/x)

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