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anonymous
 one year ago
If 4.88 grams of Zn reacts with 5.03 grams of S8 to produce 6.02 grams of ZnS, what are the theoretical yield and percent yield of this reaction? Be sure to show the work that you did to solve this problem.
unbalanced equation: Zn + S8 yields ZnS
Someone please help me!!!
anonymous
 one year ago
If 4.88 grams of Zn reacts with 5.03 grams of S8 to produce 6.02 grams of ZnS, what are the theoretical yield and percent yield of this reaction? Be sure to show the work that you did to solve this problem. unbalanced equation: Zn + S8 yields ZnS Someone please help me!!!

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JFraser
 one year ago
Best ResponseYou've already chosen the best response.0first and most important, balance the equation

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2Yep, @JFraser is right. Do you know how to balance, @firesquad ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Balanced equation: 8Zn + S8 > 8ZnS

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@JFraser @JoannaBlackwelder

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2Yep, good. Percent yield = (actual/theoretical)*100

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2Actual is the amount of product given in the problem.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2Theoretical is the amount of product found using stoichiometry from the amount of reactant given.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2*from the amount of limiting reactant

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I am stuck right here 4.88 g Zn x (1 mol Zn/ 65.38 g Zn) = 0.07464 mol Zn 5.03 g S8 x (1 mol S8/ 256.48 g S8) = 0.01961 mol S8

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2Ok, now use the molar ratios from the balanced reaction to convert to moles of ZnS

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2For both calculations.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0would the ratio be 1: 8

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2For S8:ZnS, yes

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2But not for Zn:ZnS

anonymous
 one year ago
Best ResponseYou've already chosen the best response.00.07464 mol Zn * (1/1)= 0.07464 mol Zn 0.01961 mol S8 * (8/1) = 0.1569 mol S8 is that how to do it

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2Well, that looks good for everything but the units at the end.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0What do I have to change for the units?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.20.07464 mol ZnS 0.1569 mol ZnS

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2See why I did that?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Oh Ok, now I find the percent yield right?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2Well, we need to first determine which value of product to go with.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2This is the limiting reactant part. Do you know how to determine that?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The limiting reactant is S8

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2No, the limiting reactant is the reactant that produces less product.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2So, what is the mass of product using the limiting reactant?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Sorry for wait I had to do something. It is 0.07464 mol ZnS

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2No worries. That is the moles of product. What is the mass of product?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2Hm, that's not what I get. How did you do that?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I got it from the first formula

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2Hm, let me show you how I would do this step: 0.07464 mol ZnS(97.44 g/1 mol) = ? g ZnS

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2:) So, can you find the percent yield?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Wait 7.27 is the theoretical yield

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so what is the actual yield?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2The amount of product given in the problem.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.2You're welcome! :)
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