quantative chemistry Flashcards
paper 1
the mass of products at the end of a reaction must
must equal the mass at the start
relative formula mass?
the mass of a compound (Mr)
(how much it weighs)
law of conservation of mass?
no atoms are lost or made in a chemical reaction
relative atomic mass?
a compounds AVERAGE atomic mass (Ar)
how can the Mr of a compound be found
by adding up the relative atomic masses in its formula
what does 1 mole contain?
6.02x10*23 particles
one mole in grams is the same as..
its Mr -relative formula mass
moles equation
moles= mass/ Mr
what’s the limiting reactant?
the one that gets used up first
solute?
a dissolved substance
ion?
an atom with a P or N charge because it has lost or gained one or more electrons
solvent?
the substance that dissolves a solute
-usually a liquid
what happens in covalent bonding?
where the 2 atoms SHARE the electrons
what happens in ionic bonding?
where one atom gives the electron to the other
