a gas cylinder contains exactly 1 mole of oxygen gas (o₂). how many molecules of oxygen are in the…

a gas cylinder contains exactly 1 mole of oxygen gas (o₂). how many molecules of oxygen are in the cylinder?\n4.01×10²² molecules\n6.02×10²³ molecules\n9.03×10²⁴ molecules\n2.89×10²⁶ molecules

a gas cylinder contains exactly 1 mole of oxygen gas (o₂). how many molecules of oxygen are in the cylinder?\n4.01×10²² molecules\n6.02×10²³ molecules\n9.03×10²⁴ molecules\n2.89×10²⁶ molecules

Answer

Explanation:

Step1: Recall Avogadro's number

Avogadro's number ($N_A$) is $6.02\times 10^{23}$ molecules/mol.

Step2: Calculate number of molecules

For 1 mole of oxygen gas, number of molecules $N = n\times N_A$, where $n = 1$ mol. So $N=1\ mol\times6.02\times 10^{23}\ molecules/mol = 6.02\times 10^{23}$ molecules.

Answer:

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