The Avogadro's constant is the number of?

Molecules in 1 mole of a substance

Electrons in 1 gram of hydrogen

Protons in 1 mole of a substance

Which of the following statements is incorrect?

12 g of carbon gas contains one mole of atoms

28 g of nitrogen gas contains one mole of molecules of N2

1dm3 of 1.0 mole dm-3 solution of NaCl contains one mole of chloride ions

One mole of propane has the same

Number of H- atoms as one mole of methane (CH4)

Number of C-atoms as in one mole of butane (C4H10)

Mass as half a mole of hexane (C6H14)

Number of molecules as in one mole of ethane (C2H6)

MCQs On Stoichiometry and Stoichiometric Calculations

Chemistry

Reviewed by Janyce Wowk

Janyce Wowk, BS (Chemistry) |

Chemistry

Review Board Member

Janyce Wowk is a chemistry professional with a B.S. in Chemistry from Montclair State University. Her experience as a research assistant and lab technician in a PFAS laboratory has allowed her to develop strong laboratory, data analysis, and research skills.

, BS (Chemistry)

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Alfredhook3

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| Attempts: 7,651 | Questions: 18 | Updated: Aug 19, 2025