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Wittaler [7]
3 years ago
13

For the balanced equation shown below, if the reaction of 77.0 grams of CaCN2 produces 26.1 grams of NH3, what is the percent yi

eld?
CaCN2+3H2O=>CaCO3+2NH3
Chemistry
1 answer:
11111nata11111 [884]3 years ago
4 0

%yield = 86.93%

<h3>Further explanation</h3>

Given

Reaction

CaCN₂+3H₂O=>CaCO₃+2NH₃

Required

The percent yield

Solution

mol CaCN₂(MW= 92 g/mol) :

= mass : MW

= 77 g : 92 g/mol

= 0.834

From equation, mol NH₃ :

= 2/1 x mol CaCN₂

= 2/1 x 0.834

= 1.668

Mass NH₃(theoretical):

= 1.668 mol x 18 g/mol

= 30.024 g

% yield = (actual/theoretical) x 100%

%yield = (26.1/30.024) x 100%

<em>%yield = 86.93%</em>

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<em>A chemistry student needs 55.0 g of carbon tetrachloride for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of carbon tetrachloride is 1.59 g/cm³. Calculate the volume of carbon tetrachloride the student should pour out. Be sure your answer has the correct number of significant digits.</em>

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