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Lena772
 one year ago
If at the beginning of the reaction you used 4.30 g NH3 and 15.76 g O2, what is the theoretical yield (in grams) of NO (you will need to find the limiting reagent and then the theoretical yield of NO from this reagent)?
Lena772
 one year ago
If at the beginning of the reaction you used 4.30 g NH3 and 15.76 g O2, what is the theoretical yield (in grams) of NO (you will need to find the limiting reagent and then the theoretical yield of NO from this reagent)?

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Lena772
 one year ago
Best ResponseYou've already chosen the best response.0\[4NH _{3} + 5O _{2} →4NO +6H _{2} O\]

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1The limiting reagent is found by dividing the moles of the reactants by their respective stoichiometric coefficients (from the balanced reaction they're participating in). Compare these values, the lowest is the limiting reagent.

Lena772
 one year ago
Best ResponseYou've already chosen the best response.04.30g NH3 * 1 mol / 17.03g NH3 = 0.252 mol NH3 15.76g 02 * 1 mol / 32 g O2 = 0.4925 mol O2

Lena772
 one year ago
Best ResponseYou've already chosen the best response.00.252/4=0.063 0.4925/5 = 0.0985 O2 would be the limiting reagent

Lena772
 one year ago
Best ResponseYou've already chosen the best response.0okay... so now what do I do?

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1Use the moles from NH3 to find the theoretical yield. it's the exact same process as the last question

Lena772
 one year ago
Best ResponseYou've already chosen the best response.00.063*17.03= 1.07289 g

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1wait the molar mass of NO is not 17.03 g/mol

Lena772
 one year ago
Best ResponseYou've already chosen the best response.0right. So it would be 1.89 then ?

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1everything seems to be in order

Lena772
 one year ago
Best ResponseYou've already chosen the best response.0Were the coefficients for the reactants supposed to be used anywhere? @aaronq

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1yeah, when you compare NH3 to NO, you need to use the coefficients, but since both are 4, it doesn't make a difference

Lena772
 one year ago
Best ResponseYou've already chosen the best response.0Hmm I don't know why I'm getting it wrong then

Lena772
 one year ago
Best ResponseYou've already chosen the best response.0You don't use the coefficient in the initial conversion of grams to moles @aaronq ?

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1nope, mass to moles interconversions only involve the molar mass \(\sf moles=\dfrac{mass}{Molar~mass}\)

aaronq
 one year ago
Best ResponseYou've already chosen the best response.1idk either, you're using the correct number of sig figs too
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