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Standard XII

Chemistry

Percentage Composition

A certain met...

Question

A certain metal sulphide, $M S_{2}$ , is used extensively as a high temperature lubricant. If $M S_{2}$ is $40.06 %$ by mass of sulphur, metal $M$ has atomic mass :

160

amu

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64

amu

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40

amu

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96

amu

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Solution

The correct option is D $96$ amu
Molecular weight of $M S_{2} = 2 S + M$
$\frac{64}{M + 64} = 0.4006$
$∴ M = 96$

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A certain metal sulphide, MS2, is used extensively as a high temperature lubricant. If MS2 is 40.06% by mass of sulphur, metal M has atomic mass :

The correct option is D 96 amuMolecular weight of MS2=2S+M64M+64=0.4006∴M=96

A certain metal sulphide, $M S_{2}$ , is used extensively as a high temperature lubricant. If $M S_{2}$ is $40.06 %$ by mass of sulphur, metal $M$ has atomic mass :

The correct option is D $96$ amu
Molecular weight of $M S_{2} = 2 S + M$
$\frac{64}{M + 64} = 0.4006$
$∴ M = 96$