题目
题目
单项选择题

Calcium oxide reacts with excess carbon dioxide to produce calcium carbonate.  Junior Chemist isolates 5.9 g of calcium carbonate at the end of her experiment.  Earlier she had calculated (from stoichiometry) a yield of 12.8 g.  What is her % yield?

选项
A.46%
B.59%
C.78%
D.128%
E.217%
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标准答案
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思路分析
We need to evaluate the percent yield using the formula: percent yield = (actual yield / theoretical yield) × 100. Option 1: 46% — Compare 5.9 g (actual) to 12.8 g (theoretical). (5.9 / 12.8) × 100 ≈ 0.4609 × 100 ≈ 46.1%. This matches the calculated value, so this option is consiste......Login to view full explanation

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