C3- Quantative chemistry

Cards (10)

what is the law of conservation
no atoms are lost or made in chemical reaction
mass of products = mass of reactants
when are ionic compounds formed
meta reacts with non metal
what ions do metals form
positive ions
what ions do non metals form
negative ions
key rule of formulas of ionic compounds
ions have to cancel out to leave overall charge of 0
what is relative atomic mass
average mass of isotope of that element weighted / big number of atom on periodic table
how to find percent by mass of an element
total relative atomic mass of atom / relative formula mass of compound x 100
how to find number of moles of element
number of moles = mass/relative atomic mass
what is avogadros constant  
6.02 x 10 ^23
how to find concentration
concentration= mass (G) / volume (dm^3)