Hello all, The question states that X has 0.035 mg of estradiol in each pill.The

Question

Hello all,

The question states that X has 0.035 mg of estradiol in each pill.The formula of this compound is: C20H24O2.

A. How many moles of estradiol in one pill? I found the answer tobe 1.18E-7 mol.

B. Molecules? I got 7.2E16.

C. How many Carbon atoms are in 0.035 mg sample of estradiol?

^^^ This is my question? How to set this problem up? I am confusd.So far I have:

.035 mg * 1 gram * 1 mol Estradiol/ (10^3 mg) (296 gramsEstradiol).

But I am unsure where to go from here?

D. The next part says what is the mass of carbon in this---ingrams?

I just need help with the setup. I'll do the calculationsmyself.


Help with the setup is much appreciated and I will ratelifesaver!

Thanks.

Explanation / Answer

The number of Carbon atoms are in 0.035 mg (0.0035 *10-3 g) sample of estradiol                              (0.035 * 10-3g C20H24O2* 20 atoms C ) /(296.36 g C20H24O2)                               = 2.36 * 10-6 atoms C Mass of 1 Carbon atom = 12.011 g Mass of 2.36 * 10-6 atoms C = (12.011 g * 2.36 *10-6 atoms C ) / 1 Carbon atom                                             = 2.84 * 10-5 g

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