Finding molar mass of sulfide of metal hydroxide? (E. 15)

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Isaac Wen
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Finding molar mass of sulfide of metal hydroxide? (E. 15)

Postby Isaac Wen » Wed Oct 07, 2020 8:09 pm

Hi! The question goes like this:
The molar mass of the metal hydroxide M(OH)2 is 74.10g/mol. What is the molar mass of the sulfide of this metal?

Where did the sulfide come from? There's sulfide in M(OH)2???

Lillian Ma 1I
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Re: Finding molar mass of sulfide of metal hydroxide? (E. 15)

Postby Lillian Ma 1I » Wed Oct 07, 2020 8:20 pm

Hi! I was confused about this as well for quite a while, but I think the question is asking you to find what the metal is first by subtracting the mass of (OH)2 from the molar mass, then finding what the molar mass of the sulfide of that metal would be (basically the molar mass of MS). Hopefully that makes sense to you :)

Isaac Wen
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Re: Finding molar mass of sulfide of metal hydroxide? (E. 15)

Postby Isaac Wen » Wed Oct 07, 2020 8:21 pm

ahh that makes a lot more sense bahaha. Thank you so much for the clarification!

IanWheeler3F
Posts: 61
Joined: Wed Sep 30, 2020 9:49 pm

Re: Finding molar mass of sulfide of metal hydroxide? (E. 15)

Postby IanWheeler3F » Fri Oct 09, 2020 3:59 pm

Just be sure to remember the metal has a +2 charge and you need 2 sulfides


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