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A particular oral contraceptive contains 0.042 mg of ethinyl estradiol in each pill. The formula of...

A particular oral contraceptive contains 0.042 mg of ethinyl estradiol in each pill. The formula of this compound is C20H24O2. How many moles of ethinyl estradiol are there in one pill? (give answer to 3 digits)

How many hydrogen atoms are there in one of these pills (due to the presence of ethinyl estradiol)? (give answer to 3 digits)

What mass of hydrogen is this? (Enter the answer in grams.)

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