Theoretical yield

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Theoretical yield

Determine the theoretical yield of H2S (in moles) if 4.0 molAl2S3 and 4.0 mol H2O are reacted according to the followingbalanced reaction. A possibly useful molarmass is Al2S3 =150.17Al2S3(s)+6H2O(l)-->2Al(OH)3(s)+3H2S(g)

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Answer 1

Answer #1

Because for every mole of Al₂S₃ that reactsyou need 6 moles H₂O, you know that H₂O isthe limiting reactant (there aren't even 6 moles). Next, takethe moles of H₂O, and multiply that by the ratio ofmoles between H₂O and H₂S, according to theequation (

, use the coefficients). And thatwill give you the theoretical yield of H₂S in moles.

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Answer 2

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