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Which of the following statements is incorrect? Molecular mass is expressed in a

ID: 813477 • Letter: W

Question

Which of the following statements is incorrect?

Molecular mass is expressed in atomic mass units

Formula mass compares the mass of one formula unit of a substance to the mass of one atom of carbon-12

Atomic mass has units of grams per atom

Both molecular mass and formula mass use carbon-12 as a reference standard

Sodium chloride, an ionic compound, is said to have a formula weight, but not a molecular weight

a.

Molecular mass is expressed in atomic mass units

b.

Formula mass compares the mass of one formula unit of a substance to the mass of one atom of carbon-12

c.

Atomic mass has units of grams per atom

d.

Both molecular mass and formula mass use carbon-12 as a reference standard

e.

Sodium chloride, an ionic compound, is said to have a formula weight, but not a molecular weight

Explanation / Answer

c.

Atomic mass has units of grams per atom

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