How many oxygen atoms are contained in 0.50 mole of KHSO4 when considering its molecular composition?

• A. 1.2 (10^23)
• B. 2.4 (10^23)
• C. 3.0 (10^23)
• D. 1.2 (10^24)

Answer: (D)

To determine the number of oxygen atoms in 0.50 mole of KHSO4, it’s essential to first understand the molecular composition of KHSO4, also known as potassium hydrogen sulfate. The chemical formula indicates that each molecule contains four oxygen atoms.

Given that there are four oxygen atoms per molecule, we can calculate the total number of oxygen atoms in 0.50 mole.

Start by recognizing that one mole of any substance contains Avogadro's number of molecules, which is approximately (6.02 \times 10^{23}) molecules per mole. Thus, in 0.50 moles of KHSO4, the number of molecules is:

[

0.50 , \text{moles} \times 6.02 \times 10^{23} , \text{molecules/mole} \approx 3.01 \times 10^{23} , \text{molecules}

]

Since each molecule of KHSO4 contains four oxygen atoms, the total number of oxygen atoms can then be calculated as follows:

[

3.01 \times 10^{23} , \text{molecules} \times 4 \