A researcher is using 6.53 x 1023 molecules of chlorine gas (Cl2) in an experiment.

Question

A researcher is using 6.53 x 10²³ molecules of chlorine gas (Cl₂) in an experiment. How many grams of chlorine is the researcher using? Remember to include units (abbreviated appropriately) and the substance in your answer. Round your answer to the nearest 0.01.

Thanks in advance.

Answer 1

Cl₂ has a molar mass of 70.91 g / mole

Avogadro's number is 6.022x10²³ molecules / mole

6.53x10²³ molecules Cl₂ x 1 mol Cl₂ / 6.022x10²³ molecules = 1.084 moles Cl₂

1.084 moles Cl₂ x 70.91 g / mole = 76.89 g Cl₂