Stoichimoetry(ALL) Flashcards
Define relative atomic mass
The average mass of one atom or element when compared with 1/12 the mass of one atom of carbon-12
Define relative molecular mass
The relative molecular mass of a molecule is the average mass of one molecule of a substance when compared with 1/12 the mass of one atom of carbon-12
Formula for percentage of element in compound by mass
(No of atoms*Ar of element)/ Mr of the compound *100%
What is the value of Avogadro’s constant
6.02 *10^23
Define molar mass and state its unit
Molar mass is the mass of one mole of any substance
Unit: g/mol
State Avogadro’s Law
Equal volumes of all gases, under same temperature and pressure contain the same number of particles
Define limiting reactant
The reactant that is completely used up in a reaction and limits amount of products formed
Define standard solution
A solution of known concentration
Define theoretical yield
The amount of product calculated from the equation
Define experimental yield
The amount of product actually obtained in the experiment
How to find concentration in mol/dm3 using concentration in g/dm3
conc(mol/dm3) = conc(g/dm3) / molar mass of solute in g/mol
