chemistry c4

How to calculate formula mass

Add up the atomic mass of the element (bottom number)

Give 2 reasons mass in a reaction can appear to change

Contains impurities

Reversible reaction

Give the formulae for calculating concentration

Concentration= mass divided by volume

How do you calculate the number of moles

Mass divided by relative formula mass (mr)

How do you calculate percentage by mass

Mass of element divided by mr multiplied by 100

How to calculate mass

Mass = moles multiplied by mr

Reasons percentage yield is less than 100 percent

Reversible reactions

Loss of product

How to calculate percentage by mass

Mass of element divided by mr multiplied by 100

how to calculate atom economy

Mr of desired product divided by mr of all products multiplied by 100