The student will :
have a comprehension of “mole”
calculate molar mass using periodic chart.
calculate moles to grams to moles.
calculate molecules using avogadro’s number.
First 3 things to learn
Molar mass
mole
p.81
Avogadro's number
Formula mass
Molecular mass
Atomic mass
Formula weight
Molecular weight
Atomic weight
Atomic mass units
Molar mass is the mass in grams of one mole of the compound
Ex) carbon monoxide molar mass = 28.01 grams
CO….carbon=12.01amu + oxygen = 16.00 amu ……..28.01 grams
sodium chloride molar mass = 58.45 grams
NaCl…..sodium= 22.99 amu + chlorine= 35.45amu…….58.44 grams
ws-9.0
DO NOT ROUND-OFF
Ws 9.0
Mole ==== dozen
Mole or mol
cars
eggs
volcanos
Mole = the amount of substance that contains the same
number of particles as 12.01 grams of carbon 12.
A chemist may want
1mol of Sulfur = 32.07grams
1mol of Copper= 63.55 grams
1mol of Aluminum = 26.98 grams
1mol of H20 = 18.016 grams
1mol of NH4Cl =53.492 grams
***units are just as important as numbers***
** units tell you to multiply or divide ** Ws.9.1
1.
How many moles are in 11 grams of Sodium?
2.
How many grams in 2.7mol of Phosphorus?
3.
How many moles are in 23grams of Krypton?
4.
How many grams are in 86.93mol of Calcium?
5. How many moles are in 5.6 grams of Magnesium?
6. How many grams are in 242 moles of arsenic?
7. How many moles are in 2.7grams of Sodium Hydroxide?
8. How many moles are 52.5 grams of Copper II Sulfate?
9. How many grams are in 75 moles of water?
10. How many moles are in 1.7 x 105 grams of methane?
11. How many grams are in 4.3 x 10-6 moles of Calcium phosphate?
12. How many grams are in 18.37 x 10-2 moles of silicon dioxide?
13. How many moles in 2.3 x 103 grams of potassium sulfide
14. How many grams in 15 moles of hydrochloric acid?
15. How many grams in 132 x 105 moles of Manganese?
16. How many grams in 232 x 103 moles of aluminum
hydroxide?
1x 102 = hundred
1x 103 = thousand
1x 106 = 1 million
1x 109 = 1 billion
1x 1012 = 1 trilliion
l million = spend $1,000.00/day
starting today , ---1 billion = spend $1000.00/day
start day, 600BC--1 trillion = spend $1000.00/second……$1.444 million per day
need ___________ years to spend it
Avagadro’s number = 6.022 x 1023
One mole of anything has avagadro’s number in it.
atoms in it
Avagadro’s # 6.022 x 1023
molecules in it
One mole of mm’s will cover the United States…. How deep?
1 mol of Cu has 6.022 x 1023 atoms
1 mol of Ag has 6.022 x 1023 atoms
1 mol of H20 has 6.022 x 1023 molecules
1 mol of CuSO4 has 6.022 x 1023 molecules
***word units are as important as the numbers***
“word units tell if multiplying or dividing”
“because every experiment is different…...there is no set pattern or formula”
“the word unit to eliminate goes opposite”
ws.9.03
l.
How many molecules in 28grams of Sodium Sulfate?
2.
How many moles in 28grams of Sodium Sulfate?
3
How many grams in 7.5 x 1028 molecules of SilverNitrate
4. How many moles in 7.5 x 1028 molecules of SilverNitrate?
5. How many moles in 120x1042 molecules of Sodium
Chloride?
6. How many molecules in 25g of Sodium Chloride?
7. How many molecules in 122g of Copper II Nitrate?
8. How many grams in 9.4 x 1025 molecules of hydrogen
gas?
9. How many molecules in 230 moles of Cobalt II Chloride?
10. How many moles are in 9.4 x 1025 molecules of Sulfuric
Acid?
11. How many grams are in 9.4 x 1025 molecules of Sulfuric
Acid?
12. How many molecules are in 255 grams of Ammonium
Hydroxide?
14. How many molecules of Aspirin are in one pill?
One pill is .2g. Aspirin(C9H8O4)
15. How many moles of Aspirin in 2 pills?
16. How many molecules of Cocaine would a drug
addict pump in his blood stream if the person used
one gram?
Cocaine ( C17H21NO4)
AP-problem;
p.93
Isopentyl acetate is the compound responsible for the scent of
bananas. Interestingly bees release about 1ug(1 X 10-6g) of this
compound when they sting. The resulting scent attracts other
bees to join the attack.
How many molecules of isopentyl acetate( C7H14O2) are released
in a typical bee sting?
How many atoms of Carbon are present?
Note:
1 mole of CH4 contains
1mole of carbon and 4moles of hydrogen
The student will :
have a comprehension of “mole”
calculate molar mass using periodic chart.
calculate moles to grams to moles.
calculate molecules using avogadro’s number.