Question

how many molecules does 1 mole of o2 gas have? a. 3.01 × 10^23 molecules b. 12.04 × 10^23 molecules c. 15.99 × 10^23 molecules d. 6.02 × 10^23 molecules

Explanation:

Step1: Recall Avogadro's number

Avogadro's number ($N_A$) is defined as the number of entities (such as atoms, molecules) in one - mole of a substance. The value of Avogadro's number is approximately $6.02\times 10^{23}$ entities per mole.

Step2: Apply to 1 mole of $O_2$

For 1 mole of any substance, the number of molecules is equal to Avogadro's number. So, 1 mole of $O_2$ gas has $6.02\times 10^{23}$ molecules.

Answer:

D. $6.02\times 10^{23}$ molecules