Equations

Question 1

What is the formula for Relative Atomic Mass?

Answer 1

∑(Mass × Abundance) / 100

Question 2

What does Relative Formula Mass represent?

Answer 2

Sum of relative atomic masses of all the atoms

Question 3

How do you calculate the number of moles?

Answer 3

Mass of substance / Relative Formula Mass

Question 4

How is concentration defined?

Answer 4

Mass of substance / Total Volume

Question 5

How else can concentration be expressed?

Answer 5

Number of moles / Total Volume

Question 6

What is the unit conversion for volume in dm3?

Answer 6

1 dm3 = 1000 cm3

Question 7

What is the formula for Percentage Yield?

Answer 7

Mass of product obtained / Maximum theoretical mass of product × 100

Question 8

What is the formula for Atom Economy?

Answer 8

Relative formula mass of desired product / Sum of all relative formula masses from reactants × 100

Question 9

What is the formula to calculate the volume of gas occupied?

Answer 9

Number of moles × 24

Question 10

What is the formula for Energy Change?

Answer 10

(Sum of energy to break bonds) - (Sum of energy to make bonds)

Question 11

What is the Mean Rate of Reaction based on reactants used?

Answer 11

Quantity of reactants used / Time taken

Question 12

What is the Mean Rate of Reaction based on products formed?

Answer 12

Quantity of products formed / Time taken

Question 13

What is the general formula for Alkanes?

Answer 13

CnH2n+2

Question 14

What is the general formula for Alkenes?

Answer 14

CnH2n

Question 15

What does Rf stand for in chromatography?

Answer 15

Distance moved by substance / Distance moved by solvent