Answer :
We are given that the atomic mass of potassium is [tex]$39.1$[/tex]. This value represents the mass in grams of one mole of potassium atoms. One mole of any substance contains [tex]$6.02 \times 10^{23}$[/tex] atoms.
Since we have exactly [tex]$6.02 \times 10^{23}$[/tex] atoms, which is one mole, the mass is simply the atomic mass in grams. Therefore, the mass of [tex]$6.02 \times 10^{23}$[/tex] atoms of potassium is:
[tex]$$
39.1 \text{ grams}
$$[/tex]
Thus, the correct answer is option B.
Since we have exactly [tex]$6.02 \times 10^{23}$[/tex] atoms, which is one mole, the mass is simply the atomic mass in grams. Therefore, the mass of [tex]$6.02 \times 10^{23}$[/tex] atoms of potassium is:
[tex]$$
39.1 \text{ grams}
$$[/tex]
Thus, the correct answer is option B.
