A sample of the male sex hormone testosterone, C19H28O2...

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A sample of the male sex hormone testosterone, C19H28O2, contains 7.04  1020 hydrogen atoms

a) How many atoms of carbon does it contain? 

b) How many molecules of testosterone does it contain?

c) How many moles of testosterone does it contain?

d) What is the mass of this sample in grams?

Jul 23rd, 2015

Thank you for the opportunity to help you with your question!

SOLUTION:

(a) 19 : 28 = x : 7.04 x 10^20

Solve for x, we have:

x = atoms of C = 4.78 x 10^20

(b) 7.04 x 10^20 / 28 = 2.51 x 10^19

(c) 2.51 x 10^19 / 6.02 x 10^23 =4.17 x 10^-5

(d) Molar mass = 288 g/mol x 4.17 x 10^-5 =0.0120 g

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Jul 23rd, 2015

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Jul 23rd, 2015
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