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C3H8 + 5O2 → 3CO2 + 4H2O

Cassandra calculated a percent yield of 75% for grams of water produced. The theoretical yield for water is 8.2 grams. How many grams of water did Cassandra actually produce during the lab?

a)9.0 grams
b)6.2 grams
c)8.2 grams
d)10.9 grams

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Answer:

b)6.2 grams

Explanation:

Recall that percentage yield =

actual yield/theoretical yield * 100/1

theoretical yield = 8.2 grams

percentage yield = 75%

Let the actual yield be x

Hence;

75 = x/8.2 * 100

75 = 100x/8.2

75 * 8.2 = 100x

x = 75 * 8.2/100

x = 6.15 g

x = 6.2 g

75 =

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