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

Chemistry
Tutor: None Selected Time limit: 1 Day

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

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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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