Equations

Question 1

Finding mols using molar mass

Answer 1

mol = mass(g)/Mr(g/mol)

Question 2

Finding moles from concentration or volume

Answer 2

mol = concentration (M) * volume (L)

Whatever the unit for molarity will decide the volume unit.

Question 3

Finding mass

Answer 3

Rearrange equation for moles OR:
1. mass (g) = molarity (M) * volume (L) * molar mass (g/mol)
2. mass (g) = molarity (M) * molar mass (g/mol)

Question 4

Percentage weight over volume

Answer 4

% w/v = mass of solute (g)/volume of solution(ml) * 100

Question 5

What IS percentage weight over volume?

Answer 5

The weight of a solutte in an entire solution

Question 6

Dilution factor

Answer 6

Df = total volume (after dilution)/original volume (before dilution)

Question 7

Calculating an unknown quantity where two solutions/mixtures are proportional

Answer 7

C1 V1 = C2 V2

Question 8

What is x̅ in statistics?

Answer 8

mean

Question 9

What is xi in statistics?

Answer 9

A specific data point of value in a data set. It is used in the equation for standard deviation

Question 10

What is n in statistics?

Answer 10

Sample number

Question 11

Standard deviation

Answer 11