Chapter 8 Vocab

Question 1

Atomic mass unit (amu)

Answer 1

A small unit of mass equal to 1.66 × 10-24 grams

Question 2

Average atomic mass

Answer 2

weighted average mass of the atoms in a naturally occurring sample of the element

Question 3

Mole (mol)

Answer 3

The number equal to the number of carbon atoms in exactly 12 grams of pure 12C: Avogadro’s number.
One mole represents 6.022 × 1023 units

Question 4

Avogadros’s number

Answer 4

The number of atoms in exactly 12 grams of pure 12C, equal to 6.022 × 1023

Question 5

Conceptual problem solving

Answer 5

integrating the solving of the problem with an analysis of the underlying concept being used.

Question 6

Molar mass

Answer 6

The mass in grams of 1 mole of a compound

Question 7

Mass percent

Answer 7

The percent by mass of a component of a mixture or of a given element in a compound

Question 8

Empirical formula

Answer 8

The simplest whole-number ratio of atoms in a compound

Question 9

Molecular formula

Answer 9

The exact formula of a molecule, giving the types of atoms and the number of each type