PPT 3B

Question 1

Mass of covalent compounds

Answer 1

Molecular mass

Question 2

Mass of ionic compounds

Answer 2

Formula mass

Question 3

Unit that measures the amount of a substance

Answer 3

Mole (mol)

Question 4

Unit for both molecular and formula mass

Answer 4

g/mol

Question 5

Molecular mass = ?

Answer 5

Sum of atomic masses

Question 6

Shows the actual number of atoms of each element in a molecule

Answer 6

Molecular formula

Question 7

Shows the lowest whole numbers of moles, thus the relative number of atoms

Answer 7

Empirical formula

Question 8

Whole-number multiple of empirical formula

Answer 8

Molecular formula

Question 9

For some compounds, the ___ formulas are identical

Answer 9

Empirical

Question 10

Sequence

___ of given –> moles of ___ –> moles of ___
–> ___ of unknown

Answer 10

mass/volume –> given –> unknown –> volume/mass

Question 11

• Refers to the nominal conditions in the atmosphere at sea level

Answer 11

STP

Question 12

0 degrees Celcius = ___ K

Answer 12

235.15

Question 13

Pressure = 1 atm = ___ kPa

Answer 13

101.325

Question 14

The volume of ___ of any ideal gas at STP (Standard Temperature and Pressure) is ___

Answer 14

1.00 mole; 22.4 liters