A sample of water, H2O, has a mass of 38.0 g. How many atoms of oxygen are in the sample? (oxygen has 16.0 g/mol, hydrogen has 1.00 g/mol, and NA = 6.02 × 10^23)

a. 3.34 × 10^22
b. 5.35 × 10^23
c. 1.27 × 10^24
d. 2.29 × 10^25


c

Physics & Space Science

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