Chapter 10.1 and 10.2 Practice

1.00 mole of CH₂CHCH₃CH₂CHF(CH₃)₂CCH₃ contains how many moles of carbon atoms?

• 3.00 moles

• 5.00 moles

• 7.00 moles

• 9.00 moles

An exact quantity:

• has been measured very carefully

• is found by counting

• is determined by several labs

• has been defined by an international commission

A representative particle of silicon dioxide is:

• a grain of sand

• an atom of silicon

• a molecule of SiO₃

• a molecule of SiO₂

One of the following statements about atomic mass is untrue. Atomic mass is:

• a relative number

• based on carbon-12

• based on H-1

• used to determine molar mass

The _____ is the SI unit for the amount of a substance.

• milligram

• milliliter

• mole

• micron

The representative particle for O₂ is the

• atom

• molecule

• formula unit

• mole

Molar mass is defined as the mass of:

• one mole of a solution

• one mole of representative particles of a substance

• 6.02 × 10²³ particles

• one Avogadro’s number of atoms

The representative particle for KBr is the:

• atom

• molecule

• formula unit

• mole

The molar mass of an element is:

• the atomic mass expressed in grams

• the molecular mass

• the atomic mass expressed in amu

• the atomic mass expressed in milligrams

Dimensional analysis uses conversion factors.

• True

• False