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Balancing Equations
Using Molar Mass
Comp. Review
100
Balanced or not balanced? 2 C
6
H
6
+ 15 O
2
--> 12 CO
2
+ 6 H
2
O
Balanced.
100
If you have one mole of water, how much mass is this?
One mole of water is 18.01 g.
100
What does AMU stand for?
Atomic mass unit
200
Balanced or not balanced? 2 Al(OH)
3
--> Al
2
O
3
+ 3 H
2
O
Balanced
200
How many grams are in 1 mole of carbon dioxide?
44.01 g
200
This is the ratio of reagents and products in a chemical reaction.
What is the stoichiometric ratio?
300
Balance this reaction: ____ MgCl
2
+ ____ O
2
--> ____ Mg(ClO
3
)
2
_1_ MgCl
2
+ _3_ O
2
--> __1__ Mg(ClO
3
)
2
300
How many grams are in 1.5 moles of water?
There are 27.0 g of water.
300
How many atoms of each element are present in this balanced reaction, 2 Al(OH)
3
--> Al
2
O
3
+ 3 H
2
O ?
2 x Al, 6 x O, 6 x H
400
Balance this equation: ___ CH
4
+ ___ O
2
--> ___ CO
2
+ ___ H
2
_1_ CH
4
+ _2_ O
2
--> _1_ CO
2
+ _2_ H
2
400
How many moles are in 53 g of Na
2
CO
3
?
There are 0.5 moles.
400
This is how many units are in a mole.
6.022 x 10
23
units are in a mole (Avogadro's Number)
500
Balance this equation: ___ C
6
H
6
+ ___ O
2
--> ___ CO
2
+ ___ H
2
O
_2_ C
6
H
6
+ _15_ O
2
--> _12_ CO
2
+ _6_ H
2
O
500
How many moles are in 594.3 g of barium bromide?
There are 2.0 moles of BaBr
2
.
500
If you have 2 moles of oxygen gas, how many molecules of O
2
do you have?
12.044 x 10
23
molecules of O
2