All but one of the following statements is true. Which one is not true? Avogadro

Question

All but one of the following statements is true. Which one is not true? Avogadro's number of molecules of a pure substance and one mole of the substance have the same mass. One mole of any pure substance contains the same number of molecules. A mass (in grams) equal to the molecular mass (in atomic mass units) of a pure substance contains the same number of molecules, no matter what the substance Ten grams of a pure substance contains the same number of molecules, no matter what the substance is. Ten grams of a pure substance contains twice as many molecules as five grams of that substance.

Explanation / Answer

1st one is not true

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