# Chemistry

In the reaction
Al2S3(s) + 6HCl(aq) --> 2AlCl3(aq) + 3H2S(g),
how many moles of HCl are used for each mole of AlCl3 formed?
A.0
B.2
C.3
D.1
E.1.5
where do you start and how do you figure it out?

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1. Well, you start by looking at the equation and using common sense. Don't panic just because this is chemistry.
The coefficients in the balanced equation tell you that 6 mols HCl produce 2 molls AlCl3. So if you only wanted 1 mol AlCl3, how many mols of HCl would be required?

What if we did this in hamburgers instead of AlCl3 and HCl.
2 buns + 2 pieces of meat + 4 pickles ==> 2 hamburgers. So how many buns are needed to make 1 hamburger? 1
How many pieces of meat? 1
How many pickles? 2

Or, if you don't like hamburgers, use cars. If it takes you 1 hour to drive 60 miles, how long will it take to drive 30 miles? 1/2 an hour.

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2. I would say...hmmm...A or C...I’m not really sure

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3. If you don't know why are you guessing?

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4. urmom

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