When doing mole to mole conversions, you use these from the balanced chemical equation.
What are coefficients
100
For the reaction between hydrogen and oxygen to get water, if you are given 10 mol of hydrogen, how many moles of oxygen do you need?
What is 5 mol oxygen
100
For the reaction between hydrogen and oxygen to produce water, if you are given 3.6g of hydrogen and excess oxygen, how many grams of water can you make?
What is 32g of water
100
The other reagent in a reaction that is not limiting is called...
What is the excess reagent
100
What color was the solid you produced in lab?
What is yellow-orange
200
The reactant that determines the amount of product that can be formed in a reaction
What is limiting reagent
200
For the reaction: 2Al + 3FeO --> 3Fe + Al2O3, how many grams of aluminum are needed to react with 1.5 mol of FeO?
What is 27g Al
200
How many liters of H2S are produced when you are given 16.4L of hydrogen according to the following reaction: 4H2 + CS2 --> CH4 + 2H2S?
What is 8.20L H2S
200
If you are given 5.0 mol of hydrogen and 4.0 mol of oxygen, what is your limiting reagent if the reaction is: 2H2 + O2 --> 2H2O?
What is hydrogen
200
What is the first step in a limiting reagent problem (after obtaining the balanced chemical equation)?
What is convert givens to moles
300
This is conserved in every chemical reaction.
What is mass
300
For the reaction: C5H12 + 8O2 --> 5CO2 + 6H2O, how many liters of carbon dioxide are produced from 20.0 mol of oxygen?
What is 280L of carbon dioxide
300
How many molecules of water are produced when 6.5g of oxygen reacts with excess hydrogen?
What is 2.4x1023 molecules of water
300
If you burn 18.0g of carbon in 6.5g of oxygen, how many grams of carbon dioxide can you make? The reaction is: C + O2 --> CO2
What is 8.9g CO2
300
If you actually made 6.5g of a compound, but were supposed to make 6.9g, what was the efficiency?
What is 94%
400
This is the efficiency of your reaction; or the percentage of the actual amount over the amount you could produce
What is percent yield
400
How many molecules of oxygen are required to react with 1.00 mol of carbon monoxide in the following reaction: 2CO + O2 --> 2CO2
What is 3.01x1023 molecules of oxygen
400
How many liters of hydrogen are produced when 28.1g of beryllium react according to the following reaction: Be + 2H2O --> Be(OH)2 + H2?
What is 69.9L of hydrogen
400
You are given 6.0g of oxygen and 3.0g of hydrogen and your theoretical yield is 0.375 mol of water. If oxygen ran out first, how much excess reagent (hydrogen) do you have left?
What is 2.2g hydrogen
400
What do you ALWAYS do before leaving the lab?
What is wash your hands :)
500
The maximum amount of product that could be formed from given amounts of reactants
What is theoretical yield
500
How many moles of glucose can be "burned" when 25.5g of oxygen is available in the following reaction: C6H12O6 + 6O2 --> 6CO2 + 6H2O
What is 0.133 mol glucose
500
When ammonia (NH3) reacts with oxygen, it produces water and nitrogen dioxide. If you have 5.4 mol of oxygen, how many liters of ammonia do you need?
What is 69L of ammonia
500
Cl2 + H2 --> 2HCl. If you are given 20.0g chlorine and 18.0g of hydrogen, how much hydrochloric acid can you make?
What is 20.6g HCl.
500
Why do we get percent yield values less than 100%?
Because we make mistakes - we don't transfer compounds properly, the reaction doesn't go to completion, or there might be some contamination.