What is the mass of a water molecule, O, in grams? (1 amu = 1.661 × 10^-24 g)

Question

Quizplus · Accepted Answer

The mass of a water molecule (H2O) is equal to the sum of the masses of two hydrogen atoms (each with a mass of 1 amu) and one oxygen atom (with a mass of 16 amu). Therefore, the mass of a water molecule is 18 amu. Using the conversion factor given in the question, we can convert amu to grams as follows:
18 amu x (1.661 x 10^-24 g/amu) = 2.99 x 10^-23 g, which is equivalent to 2.99 x 10^-23 g/molecule. Therefore, the best choice is C, which gives the mass of a water molecule in grams.

What Is the Mass of a Water Molecule, O