moles and reactive atomic mass

Question 1

what are moles

Answer 1

Moles are used to compare quantities of substances.
1 MOLE = 6.02x10 23 atoms/molecules. 123 of carbon = 1 mole

Question 2

what does the conservation of mass do to the total mass of reactants

Answer 2

mass of reactants muse equal the total mass of produces, even if a gaseous produce leaves (that is why we have to balance equations like earlier).

Question 3

how to work out moles

Answer 3

moles= mass (g)
————————-
relative atomic/formula
mass

Question 4

what does stoichiometry mean

Answer 4

the ratio of moles of one substance to another in a reaction.

Question 5

what do you do if the mass isn’t in grams

Answer 5

We’re dealing with ratios/relative masses, you’ll get the right answer so long as you’re consistent with the unit.

Question 6

what is a limiting reactants

Answer 6

In order for no reactants to be left over, there muse be the correct number of moles of both reactants in order to react completely, according to their STOICHIOMETRY.