A certain metal sulphide, M S2, is used extensively as a high temperature lubricant. If M S2 is 40.06 % by mass sulphur, metal M has atomic mass

Question

A certain metal sulphide, M S2, is used extensively as a high temperature lubricant. If M S2 is 40.06 % by mass sulphur, metal M has atomic mass (A) 160 u (B) 64 u (C) 40 u (D) 96 u

Tardigrade Admin · Accepted Answer

M S2=M+32 × 2 =M+64 % of sulphur =((64/M+64)) × 100=40.06 ∴ M+64=(6400/40.06) M+64=160 M=160-64=96

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

$160 u$

$64 u$

$40 u$

$96 u$

$M S_{2} = M + 32 \times 2$
$= M + 64$
$%$ of sulphur $= (\frac{64}{M + 64}) \times 100 = 40.06$
$∴ M + 64 = \frac{6400}{40.06}$
$M + 64 = 160$
$M = 160 - 64 = 96$

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

160u

64u

40u

96u