Answer :
To solve the problem, follow these steps:
1. The atomic mass of potassium is given as [tex]$39.1$[/tex]. This means that one mole of potassium, which is defined as [tex]$6.02 \times 10^{23}$[/tex] atoms, has a mass of [tex]$39.1$[/tex] grams.
2. Since the number of atoms provided is exactly [tex]$6.02 \times 10^{23}$[/tex], this corresponds directly to one mole of potassium.
3. Therefore, the mass of [tex]$6.02 \times 10^{23}$[/tex] atoms of potassium is [tex]$39.1$[/tex] grams.
Thus, the correct answer is:
[tex]$$\textbf{B. } 39.1\, \text{g}$$[/tex]
1. The atomic mass of potassium is given as [tex]$39.1$[/tex]. This means that one mole of potassium, which is defined as [tex]$6.02 \times 10^{23}$[/tex] atoms, has a mass of [tex]$39.1$[/tex] grams.
2. Since the number of atoms provided is exactly [tex]$6.02 \times 10^{23}$[/tex], this corresponds directly to one mole of potassium.
3. Therefore, the mass of [tex]$6.02 \times 10^{23}$[/tex] atoms of potassium is [tex]$39.1$[/tex] grams.
Thus, the correct answer is:
[tex]$$\textbf{B. } 39.1\, \text{g}$$[/tex]
