Quantitative Chemistry Equations

Question 1

What is the equation that links mass, concentration, and volume?

Answer 1

mass = concentration × volume

Question 2

How do you calculate the mass of an unknown substance in a reaction when you know the mass of another substance and their molar masses?

Answer 2

known mass / Mr x Mr of unknown mass

Question 3

What is the equation to calculate the number of moles of a substance when its mass and relative atomic mass (A) are known?

Answer 3

number of moles = mass ÷ A

Question 4

What is the formula used to calculate the percentage yield of a reaction?

Answer 4

percentage yield = actual mass of product made / theoretical mass of a product × 100

Question 5

What is the equation used to calculate the number of moles of a gas when its volume and molar volume are known?

Answer 5

amount of mol = volume / molar volume

Question 6

What is the equation used to calculate the number of moles of an element when its mass and atomic mass are known?

Answer 6

amount of mol = mass / atomic mass