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stochiometry

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Total cards: 19•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (19)

#1
Front (Question)

what is the difference between empirical and molecular formula

Back (Answer)

empirical is the simplified formula, simplest whole number ratio of the different atoms or ions in a compound while molecular shows all of the atoms, the number and type of different atoms in one molecule

#2
Front (Question)

what is meant by relative atomic mass

Back (Answer)

the average mass of teh isotopes of an element compared to the 1/12 th of the mass of an atom of carbon 12

#3
Front (Question)

what is meant by relative molecular mass

Back (Answer)

the sum of the relative atomic masses relative formula mass, Mr will be used for ionic compounds

#4
Front (Question)

what is a mol

Back (Answer)

a unit of amount of substance and that one mole contains 6.02 * 1023 particles, this is avogadro constant

#5
Front (Question)

what is the formula for moles

Back (Answer)

moles= mass/ mr

#6
Front (Question)

what is percentage yield + formula

Back (Answer)

The amount of useful product produced by a reaction expressed as a percentage. (actual yield/ theoretical yield)×100

#7
Front (Question)

formula for number of moles in terms of gas

Back (Answer)

volume of gas/ 24

#8
Front (Question)

how do you convert between dm and cm cubed

Back (Answer)

dm- cm = *1000 cm-dm = /1000

#9
Front (Question)

what is the limiting reactant

Back (Answer)

The reactant in a chemical reaction that runs out first and therefore causes the reaction to start to slow down.

#10
Front (Question)

percentage purity formula

Back (Answer)

(mass of pure product/mass of impure product)×100

#11
Front (Question)

number of moles in terms of concentration

Back (Answer)

concentration (mol/dm3) * volume (dm3)

#12
Front (Question)

what are the possible units for concentration

Back (Answer)

g/dm3 or mol/dm3

#13
Front (Question)

whats the formula for concentration in g/dm3

Back (Answer)

mass (g) / volume (dm3)

#14
Front (Question)

how do you convert mol/dm3 to g/dm3

Back (Answer)

you multiply the concentration in mol/dm3 by the MR

#15
Front (Question)

what is the atomic number

Back (Answer)

number of protons

#16
Front (Question)

what is the mass number

Back (Answer)

bigger number, protons + neutrons

#17
Front (Question)

what are the golden five + formulae

Back (Answer)

sulphate- SO4 2- carbonate- CO3 2- nitrate- NO3 - ammonium- NH4 + hydroxide- OH -

#18
Front (Question)

what is meant by relative formula mass and how to calculate it

Back (Answer)

mass of whole compound, add all the mr’s of the elements in the compound

#19
Front (Question)

how to calculate percentage composition

Back (Answer)

(mr * number of atoms/ mr of compound) * 100