Moles Unit Quiz

A mole of potassium chloride contains 6.02 x 10²³

• formual units KCl

• atoms KCl

• ions KCl

• molecules KCl

The SI unit of molar mass is

• gram/mole

• gram

• mole

• mole/gram

Avogadro’s number, 6.02 x 10²³, indicates

• the amount of charge on an electron.

• the number of particles in a mole of particles.

• a comparison of the mass of the proton and the electron.

• the weight of 1 atomic mass unit.

Magnesium sulfate is often added to water-insoluble liquid products of chemical reactions to remove any unwanted water. One of these hydrates is MgSO₄•7H₂O. What is the name of this hydrate?

• magnesium sulfate monohydrate

• magnesium sulfate hydrate

• magnesium sulfate hexahydrate

• magnesium sulfate heptahydrate

Mole : ________________:: Dozen : 12

• 144

• 2

• 6.02 x 10²³

• molar mass

Which conversion factor would you use to calculate correctly the mass of 2 moles of the element titanium?

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Which of the following is not an empirical formula?

• H₂O

• AlN

• CH₂O

• C₆H₁₂0₆

The number of molecules in a mole of any molecular substance compared to the number of atoms in one mole of any element is

• always larger.

• always less.

• sometimes larger and sometimes smaller

• always the same.

• varies with the substance.

How many molecules are present in a 6.0 gram sample of carbon dioxide, CO₂?

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Which contains the correct percent composition for vitamin E (C₂₉H₅₀O₂)?

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