Answer:
Theoretical yield of C = 7.9 g
Actual amount of C isolated = 5.0 g
Explanation:
Given that in the reaction, Compound A combines with Compound B t o produce Compound C and no other products, the reaction is a combination reaction. The equation of the reaction is given below:
A + B ---> C
Part A:
From the measurement of the masses of A and B present before and after the reaction, the following values were obtained:
Initial mass of A = 4.0 g
Final mass of A = 0.0 g
Mass of A used up + 4.0 - 0.0 = 4.0 g
Initial mass of B = 9.0 g
Final mass of B = 5.1 g
Mass of B used up = 9.0 - 5.1 = 3.9 g
According to the law of conservation of mass, matter can neither be created nor destroyed but can change from one form to another. Therefore, theoretical yield of C equal the sum of the masses of A and B used up.
Theoretical yield of C = 4.0 + 3.9 = 7.9 g
Part B:
Given that the percent yield is 63.0 % = 0.63
Actual amount of C isolated = 0.63 * 7.9 = 5.0 g
