Hi , the answer is D because the moon is blocking the sun s rays .
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A) Potassium
Potassium contains the six chemical elements that make it an alkali metal?
Answer:
35.7%
Explanation:
The percent yield is calculated by the formula:
<em>[(actual yield) / (theoretical yield)] * 100</em>
In this case, the actual yield is 0.15 grams, and the theoretical yield is 0.42 grams. So, putting these values into the equation, we have:

Thus, the percent yield of
is 35.7%.
Hope this helps!