Question

One mole of CO2 contains? (A) 6.02×10^23 atoms of oxygen (B) 6.02×10^23 atoms of carbon (C) 18.10×10^23 molecules of CO2 (D) 3g atoms of CO2

Answer 1

One mole of CO2 contains 6.02×10^23 carbon atoms and 12.04×10^23 oxygen atoms, which makes 18.06×10^23 total atoms in all.

Step-by-step explanation:

The correct answer to your question is both option (A) and (B). A mole of CO2 (carbon dioxide) contains exactly one mole of carbon atoms and two moles of oxygen atoms. Since one mole of anything in chemistry is equal to Avogadro's number, which is 6.02×10^23, one mole of CO2 would contain 6.02×10^23 carbon atoms and 2*6.02×10^23 = 12.04×10^23 atoms of oxygen. So in total, there would be 18.06×10^23 atoms present in one mole of CO2 and not 18.10×10^23 (C).

The option (D) is incorrect because a mole is a unit for amount of substance in the International System of Units (SI), and it is used to express amounts of chemical substances. It's not measured in grams.

Learn more about Moles in Chemistry