Vocab
The sum of the average atomic masses of a compound's elements
Formula Mass
What is a mole used for?
Converting a lot of really tiny things into more usable values
Molar Mass of rubidium
85.5
% of Br in HBr
98%
If you have 3.50 moles of Mg, how many atoms do you have?
3.5 x 6.022x1023 = 2.11 x 1024
The amount of product that should be able to be made in a reaction.
Theoretical yield
What is Avogadro's Number?
6.022 x 1023
Molar mass of silver
107.9
% of N in NH4Cl
26%
If you have 9.807 moles of Fe, how many atoms of it do you have?
9.807 x 6.022x1023 = 5.906x1024
The number of particles in exactly one mole of a pure substance
Avogadro's Number
About how much can a mole dig underground in one hour?
18 feet
In order to do this moles consume 70-100% of their body weight daily! They are underground engineers :)
Molar mass of O2
32
% of O in H2O2
94%
If you have 1.16 moles of carbon, how many grams do you have of it?
1.16 x 12 = 13.9 g (14)
The reactant that get used up first in a reaction
Limiting reactant
Where can be molar mass be found?
On the periodic table (it is the same as atomic mass)
Molar mass of NaCl
58.5
% of Br in MgBr2
87%
If you have 18.3 moles of zinc, how many grams do you have of it?
18.3 x 65.4 = 1196
The reactant that does not determine the amount of product made in a reaction
Excess Reactant
What is molar mass measured in?
grams/moles
Molar mass of C12H22O11
*Bonus points if you know what this is
342
*Table Sugar
% of S in Al2(SO4)3
28%
What is the mass in grams of 4.05 x1012 atoms of Br?
4.05 x1012 x 79.9/ 6.022 x 1023 = 5.37x10-10