Chapter 7 Key Terms: Chemical Quanties

Question 1

Avogadro’s number

Answer 1

The number of items in a mole, equal to 6.022 x 10^23.

Question 2

The number of items in a mole, equal to 6.022 x 10^23.

Answer 2

Avogadro’s number

Question 3

empirical formula

Answer 3

The simplest or smallest whole-number ratio of the atoms in a formula.

Question 4

The simplest or smallest whole-number ratio of the atoms in a formula.

Answer 4

empirical formula

Question 5

formula unit

Answer 5

The group of ions represented by the formula of an ionic compound.

Question 6

The group of ions represented by the formula of an ionic compound.

Answer 6

formula unit

Question 7

mass percent composition

Answer 7

The percent by mass of elements in a formula.

Question 8

The percent by mass of elements in a formula.

Answer 8

mass percent composition

Question 9

molar mass

Answer 9

The mass in grams of 1 mol of an element is equal numerically to it’s atomic mass. The molar mass of a compound is equal to the sum of the masses of the elements in the formula.

Question 10

The mass in grams of 1 mol of an element is equal numerically to it’s atomic mass. The molar mass of a compound is equal to the sum of the masses of the elements in the formula.

Answer 10

molar mass

Question 11

mole

Answer 11

A group of atom, molecules, or formula units that contains 6.022 x 10^23 of these items.

Question 12

A group of atom, molecules, or formula units that contains 6.022 x 10^23 of these items.

Answer 12

mole

Question 13

molecular formula

Answer 13

The actual formula that gives the number of atoms of each type of element in the compound.

Question 14

The actual formula that gives the number of atoms of each type of element in the compound.

Answer 14

molecular formula