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### Fundamentals E.15

Posted: Thu Oct 03, 2019 1:11 pm
The question reads: "The molar mass of the metal hydroxide M(OH)2 is 74.10 g/mol. What is the molar mass of the sulfide of this metal?" What does the question mean by sulfide?

### Re: Fundamentals E.15

Posted: Thu Oct 03, 2019 1:23 pm
The sulfide of the metal would be the compound formed by the metal (M) and sulfur. So the formula of the sulfide of the metal would look something like MS. You should first find out what element the metal is.

### Re: Fundamentals E.15

Posted: Thu Oct 03, 2019 1:27 pm
Yes! I agree! Thus, in order to solve for the molar mass of metal sulfide, you would need to find the molar mass of M by subtracting the molar mass of hydroxide from 74.1 g/mol. Then, add the difference of the two to the molar mass of sulfide, which is 32.065 to get the molar mass of metal sulfide.

### Re: Fundamentals E.15

Posted: Thu Oct 03, 2019 2:20 pm
The question refers to the compound formed by sulfur and the unknown metal.