Question

32. Equivalent weight of an element is 9 and the chemical formula
formula of its chloride is MCl3. Molecular
weight of that element must be
(A) 81
(B) 9
(C) 3
(9) 27​

Answer 1

Answer:

Let the formula of the compound be MCl

x

.

The valency of the metal x=

Equivalentlweight

Atomicweight

=

9

27

=3.

∴ The formula of its chloride is MCl

3

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Answer 2

The molecular weight of the element is 27.

Given:

The equivalent weight of an element = 9

The chemical formula of the chloride of the element = $MCl_{3}$

To Find:

The molecular weight of the element

Solution:

We can simply solve this problem by using the following process.

Atomic weight or Molecular weight of an element = Equivalent weight x Valency

Equivalent weight given = 9

And the valency of the metal with the formula $MCl_{3}$ = 3

Therefore,

Molecular weight = 9 x 3

27

Hence, the molecular weight of the element is 27.

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