Textbook Question
A sample of the male sex hormone testosterone, C19H28O2, contains 3.88×1021 hydrogen atoms. (c) How many moles of testosterone does it contain? (d) What is the mass of this sample in grams?
2. Atoms & Elements
Mole Concept
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How many carbon atoms are present in 0.174 moles of carbon?
A
1.05 x 10^23 atoms
B
6.02 x 10^23 atoms
C
2.10 x 10^24 atoms
D
3.50 x 10^22 atoms
Verified step by step guidance1
Identify the given quantity: 0.174 moles of carbon.
Recall Avogadro's number, which is \(6.022 \times 10^{23}\) atoms/mole. This is the number of atoms in one mole of any substance.
Set up the conversion from moles to atoms using Avogadro's number: \(\text{Number of atoms} = \text{moles} \times \text{Avogadro's number}\).
Substitute the given value into the equation: \(\text{Number of atoms} = 0.174 \text{ moles} \times 6.022 \times 10^{23} \text{ atoms/mole}\).
Perform the multiplication to find the number of carbon atoms in 0.174 moles.
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