In terms of molecular composition, what is found in 100 grams of water?

To understand the molecular composition of water, it is crucial to analyze its chemical formula, which is H₂O. This indicates that each molecule of water consists of two hydrogen atoms and one oxygen atom. In terms of molecular weight, hydrogen has an atomic mass of approximately 1 gram per mole, and oxygen has an atomic mass of approximately 16 grams per mole.

For 100 grams of water, we start by determining the number of moles of water. The molar mass of water can be calculated as follows:

• The molar mass of two hydrogen atoms is (2 \times 1 = 2) grams.

• The molar mass of one oxygen atom is (16) grams.

• Therefore, the total molar mass of water is (2 + 16 = 18) grams per mole.

Now, to find out how many moles are in 100 grams of water, we divide:

[

\text{Moles of water} = \frac{100 \text{ grams}}{18 \text{ grams/mole}} \approx 5.56 \text{ moles}

]

Next, we can figure out the amount of hydrogen and oxygen in these moles:

• Each