Question

how do i get 52.5 as theoretical yield in What is the percent yield of CO when 30.0 g O2 are used? The actual yield is 40.0 g CO.

Answer 1

The theoretical yield of CO is calculated using the balanced chemical equation and the given mass of O2. The percent yield is then determined by dividing the actual yield by the theoretical yield and multiplying by 100.

Step-by-step explanation:

To calculate the percent yield of CO, we first need to determine the theoretical yield of CO. We can use the balanced chemical equation and the given mass of O2 to calculate the moles of O2. Then, using the stoichiometric coefficients, we can calculate the moles of CO produced. Finally, we can convert the moles of CO to grams to find the theoretical yield.

Step 1: Write the balanced chemical equation:
2CO + O2 → 2CO2

Step 2: Calculate the moles of O2:

30.0 g O2 * (1 mol O2 / 32.00 g O2) = 0.9375 mol O2

Step 3: Calculate the moles of CO:

From the balanced equation, the stoichiometric ratio of O2 to CO is 1:2.
0.9375 mol O2 * (2 mol CO / 1 mol O2) = 1.875 mol CO

Step 4: Calculate the grams of CO:

1.875 mol CO * (28.01 g CO / 1 mol CO) = 52.5 g CO

Therefore, the theoretical yield of CO is 52.5 g.

To calculate the percent yield, divide the actual yield (40.0 g CO) by the theoretical yield (52.5 g CO) and multiply by 100.

Percent yield = (40.0 g CO / 52.5 g CO) * 100 = 76.19%