Question

Which of these is equal to 1 mole?




44 g of carbon dioxide (CO2)



8 g of helium (He)



16 g of oxygen (O)



35.45 g of diatomic chlorine (Cl2)

Answer 1

44 g of carbon dioxide (CO2)
16 g of oxygen (O)

Oxygen is diatomic but because there is written (O) I will said that 16 g is equal to one mole of oxygen atoms

Answer 2

Basically anything that has the same mass (in grams) as its molar mass (atomic mass on the periodic table) is 1 mol because all atomic masses on the periodic table are equal to one mole of that element.