Chapter 3 Flash Cards

Question 1

Formula Mass

Answer 1

sum of atomic masses of all atoms in a formula
*also called molecular mass/molecular weight

Question 2

Molar Mass

Answer 2

The mass of one mol of a substance

Question 3

Empirical Formula Steps

Answer 3

1. convert element mass to moles
2. divide each number of moles by smallest number of moles
3. multiply by integer to give smallest whole-number ratio

Question 4

Molecular Formula from empirical formula

Answer 4

Molar Mass / Empirical Formula molar mass

Question 5

Solution

Answer 5

Homogenous mixture

Question 6

Solvent

Answer 6

Component with the largest concentration

Question 7

Solute

Answer 7

Components with smallest concentration

Question 8

Molarity (M)

Answer 8

mol solute / L solution

Question 9

Dilution

Answer 9

process of decreasing the concentration of a solute

Question 10

Molar amount of solute in a solution is equal to the produce of the solution’s molarity and its volume in litres

Answer 10

MV = n

Question 11

Mass Percentage (ratio of substance mass to solution mass)

Answer 11

mass of component / mass of solution x 100

Question 12

volume percentage (ratio of substance volume to solution volume)

Answer 12

volume of component / volume of solution x 100

Question 13

ppm

Answer 13

mass of solute / mass of solution x 1,000,000

Question 14

ppb

Answer 14

mass of solute / mass of solution x 1,000,000,000

Question 15

formula mass unit

Answer 15

amu

Question 16

molar mass unit

Answer 16

g / mol