VOCABUALRY
What is a mole?
the mass of a substance that contains 6.023 x 1023 particles of the substance
What is Avogadro's number?
6.023 x 10^23
If there are 3 moles of Na2, then how many grams are in Na3?
1) Find MM of Na2 --> 23(2)
2) Multiply moles by molar mass
= 138
balance CO2 + H2O --> C6H12O6 +O2
6CO2 + 6H2O --> C6H12O6 + O2
What molar mass?
the mass of a mole of any substance
What direction does the conversion diagram go in?
mass ---> moles ---> particles
How many atoms of NaCl are in 11.2 grams of NaCl?
1.15 x 10^23
Balance Al + HCl --> AlCl3 + H2
2Al + 6HCl --> 2AlCl3 + 3H2
percent by mass of each element in a compound
How do you go from mass to moles?
Divide by the molar mass
How many moles are in 4.22 x 10^27 molecules of MgO?
7010 moles of MgO
KClO3 --> KClO4 + KCl
4KClO3 --> 3KClO4 + KCl
How do you go from particles to mass
Multiply by Avogadros number, and then divide by molar mass