Calcium Oxide Reacts with Water in a Combination Reaction to Produce

question 51

Multiple Choice

Calcium oxide reacts with water in a combination reaction to produce calcium hydroxide:
CaO(s) + $\mathrm { H } _ { 2 }$ O(l) ? $\mathrm { Ca } ( \mathrm { OH } ) _ { 2 }$ (s)
In a particular experiment,5.00 g sample of CaO is reacted with excess water and 6.11 g of $\mathrm { Ca } ( \mathrm { OH } ) _ { 2 }$ is recovered.What is the percent yield in this experiment?

• A)81.8
• B)1.22
• C)108
• D)122
• E)92.5

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