What is the mass of 24.08 * 10 ^ 23 oxygen molecules?

Decision:
Let’s write down the formula for calculating the mass.
m = v * M
Let’s calculate the amount of substance. for this we write down the formula:
v = N / NA
NA – Avogadro’s constant, which is 6.02 * 10 ^ 23 mol ^ (- 1)
Substitute the known data into the formula.
v = 24.08 * 10 ^ 23 / 6.02 * 10 ^ 23 mol ^ (- 1) = 4 mol
Let’s calculate the molar mass of oxygen.
M (O2) = 16 * 2 = 32 g / mol
Let’s substitute the data into the formula and make the calculation.
m = 4 mol * 32 g / mol = 128 g
Answer: 128 g