The Mole (n) I
(1min)
1 mole = ______________
6.022 x 1023
(1 min)
What is the most important unit un all of chemistry ?
The mole
(1min)
What unit is mass measured in chemistry ?
Grams
(1 min)
What is stoichiometry ?
Calculation of products and reactants in a chemical reaction.
(2 minutes)
What are the three main conversions discussed in class ?
n = Mass / MW
#of Atoms = (n ) (6.022 x 1023)
n = (#of Atoms) / (6.022 x 1023)
How many Bromine (Br) atoms are in 1 mole ?
6.022 x 1023 atoms
(2 min)
How many Li atoms are in 4 moles of atoms ?
2.408 x 1024
(1 min)
What is mass ?
A unit used to measure the amount of matter in an object.
(1 min)
What do the coefficients in a chemical reaction represent ?
Ex:
2 H2O2 → 2 H2O + O2
The coefficients in balanced reaction are the mole ratios between elements/ compound.
(2 minutes)
How many atoms are in 3 moles of Carbon (C)?
1.8066 * 1024
(2 min)
How many moles are in 3 grams of Hydrogen (H) ?
2.97
(2 minutes)
How many molecules are in 2 moles of CO2 ?
1.2044 x 1024
(1 min)
What is the molecular weight of Lead (Pb) ?
207.2
(2 min)
How many atoms are in 50 moles of Aluminum?
3*1025 atoms of Aluminum
(2 min)
How many moles of magnesium is 9 x 1025 atoms of magnesium?
150 moles
(2 min)
How many moles in 6.7 grams of Boron (B) ?
0.619
(2 min)
How many moles in 8.1 x 1045 atoms of Lead (Pb) ?
1.34 x 1022
(2 min)
What is the molecular weight of OH ?
17.008
(1 min)
How many atoms are in 4 moles of Chlorine (Cl) ? Show your work.
2.4 x 1024
(1 min)
Draw the stoichiometric map
TBD
(2 minutes)
How many moles of magnesium is 9 x 1025 atoms of magnesium?
150 moles
(2 min)
How many moles in 4.81 grams of Xenon (Xe) ?
0.0366
(3 min)
What is the Molecular weight of CO2 ?
44.009
(3 min)
If there is 5 grams of H2 & the molecular weight of of H2 is 2.02 g/mol , calculate the moles of H2O in the product.
2 H2 + O2 → 2 H2O
2.47
(2 min)
2 H2O → 2H2 + O2
If there are 2 grams of H2O & the MW of H2O is 18.01, Calculate the moles of O2 in the Product.
Hint: Use the stoichiometry map.
0.055 moles