Question

Trivalent metal has an equivalent mass of 32. molecular mass of metal oxide will be

Answer 1

=X2O3
=2×32+3×16
=64+48
=112

Answer 2

Answer : The molar mass of metal oxide will be 240 g/mole.

Solution : Given,

Equivalent mass = 32 g/eq

Valency of trivalent metal element = 3

Molar mass of oxygen = 16 g/mole

The molecular formula of trivalent metal oxide is, $M_2O_3$

Formula used :

Molar mass of an element = Equivalent mass × Valency

Now put all the given values in this formula, we get

Molar mass of an element = 32 × 3 = 96

Now we have to calculate the molar mass of $M_2O_3$.

Molar mass of $M_2O_3$ = $(2\times 96)+(3\times 16)=240$

Therefore, the molar mass of metal oxide will be 240 g/mole.