Western Governors University D 425
D425 Introduction to Chemistry OA Study Guide June 2026
Density Mass/Volume
Mass Density x Volume
Volume Mass/Density
Meters to cm 1m = 100cm
Meter to millimeters 1 m = 1000mm
m to cm x100
grams to kg grams divided by 1000
1000g = 1kg
1 liter = 1000mL
1000mL = 1 liter
1kg = 1000g
1cm = 10mm
1km = 1000m
Molarity = moles/liters
moles = grams/molar mass
molecules = moles x 6.022 x 10^23
moles to molecules multiply by 6.02 x 10^23
Average atomic mass (Mass)x(abundance) + (Mass)(abundance)
T= PV/nR
Mass of 50.2g of N2 1) Convert grams to moles
2)N = 14.01 x 2 = 28.02 g/mol
3) n = 50.2g/28.02 g/mol = 1.79moles
Neutrons = mass number - atomic number
aA + bB = cC + dD Kc= [C]c [D]d / [A]a [B]b
, Equilibrium equations Products on top
Reactants on bottom
Group 1 charge +1
Group 2 charge +2
Group 15 charge -3
Group 16 chage -2
Group 17 charge -1
Group 18 charge 0
Linear angle 180 degrees
Trigonal Planar angle 120 degrees
trigonal pyramidal angle 107 degrees
tetrahedral angle 109.5 degrees
Bent angle 104.5 degrees
octahedral angle 90 degrees
What is the physical state of a substance solid
that has definite shape and volume?
heterogeneous mixture a mixture in which the composition is not uniform throughout
homogeneous mixture (solution) a mixture in which the composition is uniform throughout
Pure substance 1 kind of particle
Extensive property depends on amount of substance
Intensive property do not depend on the amount of substance
Examples of intensive properties Density
Color
Melt point
Boil Point
Temp
D425 Introduction to Chemistry OA Study Guide June 2026
Density Mass/Volume
Mass Density x Volume
Volume Mass/Density
Meters to cm 1m = 100cm
Meter to millimeters 1 m = 1000mm
m to cm x100
grams to kg grams divided by 1000
1000g = 1kg
1 liter = 1000mL
1000mL = 1 liter
1kg = 1000g
1cm = 10mm
1km = 1000m
Molarity = moles/liters
moles = grams/molar mass
molecules = moles x 6.022 x 10^23
moles to molecules multiply by 6.02 x 10^23
Average atomic mass (Mass)x(abundance) + (Mass)(abundance)
T= PV/nR
Mass of 50.2g of N2 1) Convert grams to moles
2)N = 14.01 x 2 = 28.02 g/mol
3) n = 50.2g/28.02 g/mol = 1.79moles
Neutrons = mass number - atomic number
aA + bB = cC + dD Kc= [C]c [D]d / [A]a [B]b
, Equilibrium equations Products on top
Reactants on bottom
Group 1 charge +1
Group 2 charge +2
Group 15 charge -3
Group 16 chage -2
Group 17 charge -1
Group 18 charge 0
Linear angle 180 degrees
Trigonal Planar angle 120 degrees
trigonal pyramidal angle 107 degrees
tetrahedral angle 109.5 degrees
Bent angle 104.5 degrees
octahedral angle 90 degrees
What is the physical state of a substance solid
that has definite shape and volume?
heterogeneous mixture a mixture in which the composition is not uniform throughout
homogeneous mixture (solution) a mixture in which the composition is uniform throughout
Pure substance 1 kind of particle
Extensive property depends on amount of substance
Intensive property do not depend on the amount of substance
Examples of intensive properties Density
Color
Melt point
Boil Point
Temp
