Question

a metal sulphide(ms) which is responsible for discoloration of paints contain 13.3% of sulphur by mass. Identify the metal likely to be in the sulphide

Answer 1

Answer:

Let the atomic weight of metal be x .Now weight of Sulphur is 32 gm or amu ( unit doesn't matter ) .

Now molecular weight of metal will be "32 + x " , but it's 13.3 % is 32 . So

$(32 + x) \times 13.3\% = 32 \\ \\ 32 + x = \frac{32 \times 100}{13.3} \\ \\ 32 + x \approx240 \\ \\ x \approx208 \: gm$

So 208 is atomic weight of

$\huge \red{Bismuth(Bi) }$

Answer might be close to Pb and Ti .