What is the mass of a water molecule, $\mathrm { H } _ { 2 }$ O,in grams?
A)18 grams
B)1.661 × $10 ^ { - 24 }$ grams
C)2.99 × 10-23 grams
D)none of the above

Question

Quizplus · Accepted Answer

The mass of a water molecule ($\mathrm{H}_2\mathrm{O}$) can be calculated by adding the atomic masses of two hydrogen atoms (1 amu each) and one oxygen atom (16 amu), giving a total of 18 amu. Since 1 amu is approximately $1.661 \times 10^{-24}$ grams, the mass of a water molecule is $18 \times 1.661 \times 10^{-24} \approx 2.99 \times 10^{-23}$ grams.

What Is the Mass of a Water Molecule H2\mathrm { H } _ { 2 }H2​

What Is the Mass of a Water Molecule $\mathrm { H } _ { 2 }$