1. Calculate the mass of SO2 produced when 185 grams of oxygen reacts using this equation: 2Cu2S + 3O2 ----> 2Cu2O + 2SO2 2. If a student decomposes 58.498 grams of aluminum carbonate and she...

1. Calculate the mass of SO2 produced when 185 grams of oxygen reacts using this equation: 2Cu2S + 3O2 ----> 2Cu2O + 2SO2

2. If a student decomposes 58.498 grams of aluminum carbonate and she collects the gas and measures 27.68 grams of carbon dioxide, determine the percent yield for this reaction.  Al2(CO3)3   ---->  Al2O3   +  3CO2

 3. How many moles of iron metal are produced when 3.2 mol iron (III) oxide and 2.3 mol carbon monoxide react?  Fe2O3  +  3CO  ---->   2Fe  +  3CO2
 
i am so confused please help :( 

Asked on by mina0421

1 Answer | Add Yours

llltkl's profile pic

llltkl | College Teacher | (Level 3) Valedictorian

Posted on

As per the rules of enotes, I am to answer only one of your questions. Post other questions in separate threads, one at a time.

The reaction is: 2Cu2S + 3O2 ----> 2Cu2O + 2SO2

Molar mass of SO2 is (32+2*16) = 64.

From the stoichiometry of the above mentioned reaction,

3*2*16 = 96 g oxygen reacts with sufficient Cu2S to produce 2*64 = 128 g SO2.

Therefore, 185 g oxygen should react with sufficient Cu2S to produce 128*185/96 = 246.667 g SO2.

Therefore, 246.67 g SO2 will be produced when 185 g oxygen react with sufficient Cu2S.

Sources:

We’ve answered 318,988 questions. We can answer yours, too.

Ask a question