Vocabulary
A counting unit equal to 6.02 x 1023.
What is a mole?
CO2 + 2LiOH --> Li2CO3 + H2O How many moles of lithium hydroxide are required to react with 20 mol of CO2?
What is 40 mol LiOH?
Mg + 2HCl --> MgCl2 + H2 How many grams of hydrogen will be produced if we start with 2 moles of hydrochloric acid (HCl) and excess magnesium?
What is 2 g H2?
Number of steps (and conversion factors) needed for a mass-to-mass problem.
What is 3?
Your 'want' in the following problem:
How many moles are in 8.30 X 1023 molecules of H2O?
What is moles of H2O?
Grams in one mole of a substance.
What is molar mass?
6CO2 +6H2O --> C6H12O6 + 6O2 How many moles of carbon dioxide are needed to react with 3.25 mol of water in the reaction described above?
What is 3.25 mol CO2?
Mg + 2HCl --> MgCl2 + H2 What mass of HCl (MM=36.5 g/mol) is needed to react with 2.50 moles of magnesium?
What is 182 g HCl?
2KClO3 --> 2KCl + 3O2 How many grams of KCl are produced if 5.0 g of KClO3 is decomposed?
What is 3 g KCl?
Avogadro's number.
What is 6.022 x 1023?
The substance you run out of first in a chemical reaction.
What is the limiting reactant?
2Mg +O2 --> 2MgO How many moles of magnesium oxide are produced from 1.2 moles of magnesium?
What is 1.2 mol MgO?
3 Mg + 1 Fe2O3 --> 2 Fe + 3 MgO
How many moles of iron, Fe, are produced with 25.0 grams of magnesium, Mg?
What is 0.69 mol Fe?
Na + Cl2 --> 2NaCl
Sodium and chlorine react to produce sodium chloride (table salt; MM=58.5 g/mol). Determine the amount of product (NaCl) that can be produced from 24.7 g of sodium and excess chlorine.
What is 62 g NaCl?
How many moles are present in 34 grams of Cu(OH)2?
What is 0.35 mol Cu(OH)2?
The scientific term for very small pieces (such as atoms or molecules).
What are particles?
N2 + 3H2 → 2NH3
How many moles of hydrogen, H2, are needed to react with 2.0 moles of nitrogen, N2?
What is 4 mol NH3?
2 KClO3 --> 2 KCl + 3 O2
How many moles of KClO3 are needed to make 3.50 moles of KCl?
What is mol 3.50 moles KClO3?
Mg + 2HCl --> MgCl2 + H2 What mass of hydrogen is produced from the reaction of 75 g HCl (MM=36.5 g/mol) and excess Mg?
What is 2.0 g H2?
Number of steps (conversion factors) needed for a moles-to-moles problem.
1
A fraction of two chemicals that comes from a balanced chemical reaction.
What is a mole ratio?
Zn + 2HCl → ZnCl2 + H2
How many moles of hydrogen are produced from the reaction of 3.0 moles of zinc?
What is 3.0 moles of hydrogen?
___Au2S3 + ___H2 --> ___Au + ___H2S
What is 1,3,2,3?
C2H4 + 3 O2 ? 2 CO2 + 2 H2O
If you start with 45 grams of ethylene (C2H4), how many grams of carbon dioxide will be produced?
What is 141.4 grams CO2?
This questions is worth 1000 points! SURPRISE! Chlorine gas reacts with potassium bromide to produce potassium chloride and bromine gas.
Cl2 + 2KBr --> 2KCl + Br2
How many grams of potassium chloride can be produced from 300 g each of chlorine and potassium bromide?
What is 188 g KCl?