chemical calculations- CH4

Mr- atomic mass of each atom added

relative formula mass

(% x mass of 1st isotope) + (%x mass of 2nd) / 100

relative atomic mass of an element for isotopes

= number of x atoms X mass of x / formula mass of compound X100

percentage composition of x

actual mass/ expected mass x100

percentage yield

Mr of intended product / Mr of entire product x100

atom economy

mass of substance/ mass of 1 mole

number of moles

mass = moles x formula mass

reacting masses

concentration = moles/ volume

concentration

used to measure what volumes of acid and alkali completely react together

what is titration?

cm3 to dm3

/1000

1 mole of any gas at room temperature will equal 24dm3

gas at room temperature

dm3 to cm3

x1000