Balancing Equations
Using Molar Mass
Comp. Review
100
Balanced or not balanced? 2 C6H6 + 15 O2 --> 12 CO2 + 6 H2O
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 --> Al2O3 + 3 H2O
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: ____ MgCl2 + ____ O2 --> ____ Mg(ClO3)2
_1_ MgCl2 + _3_ O2 --> __1__ Mg(ClO3)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 --> Al2O3 + 3 H2O ?
2 x Al, 6 x O, 6 x H
400
Balance this equation: ___ CH4 + ___ O2 --> ___ CO2 + ___ H2
_1_ CH4 + _2_ O2 --> _1_ CO2 + _2_ H2
400
How many moles are in 53 g of Na2CO3?
There are 0.5 moles.
400
This is how many units are in a mole.
6.022 x 1023 units are in a mole (Avogadro's Number)
500
Balance this equation: ___ C6H6 + ___ O2 --> ___ CO2 + ___ H2O
_2_ C6H6 + _15_ O2 --> _12_ CO2 + _6_ H2O
500
How many moles are in 594.3 g of barium bromide?
There are 2.0 moles of BaBr2.
500
If you have 2 moles of oxygen gas, how many molecules of O2 do you have?
12.044 x 1023 molecules of O2
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