Vocabulary (30 seconds)
A conversion factor that relates the amounts in moles of any two substances involved in a chemical reaction.
What is mole ratio?
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 2.0 moles of hydrochloric acid and excess magnesium?
What is 2.0 g H2?
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?
N2 + 3H2 --> 2NH3
In the reaction above, a student reacted 28 g of nitrogen with an excess of hydrogen. According to the students measurements, the reaction produced 30 g of product. The theoretical yield was 34 g. What is the molar mass of ammonia?
What is 17.04 g/mole?
The mass of one mole of an element, molecule or compound.
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 hydrochloric acid (MM=36.5 g/mol) is needed to react with 2.50 moles of magnesium?
What is 182 g HCl?
KClO3 --> KCl + O2 How many grams of KCl are produced if 5.0 g of KClO3 is decomposed?
What is 3.0 g KCl?
Avogadro's number.
What is 6.022 x 10^23?
It means element measuring.
What is stoichiometry?
Mg +O2 --> MgO
How many moles of magnesium oxide are produced from 1.2 moles of oxygen?
What is 2.4 mol MgO?
How many moles of aluminum atoms are needed to combine with 1.58 mol of oxygen molecules to make aluminum oxide?
What is 2.11 mol Al?
Sodium and chlorine react in a synthesis reaction. Determine the amount of product that can be produced from 24.7 g of sodium and excess chlorine.
What is 62.8 g NaCl?
How many moles are present in 34 grams of Cu(OH)2?
What is 0.35 mol Cu(OH)2?
This gives you the the mole relationship between between substances involved in a chemical change.
What is a balanced chemical reaction?
Ammonia, NH3, is widely used as a fertilizer and in many household cleaners. How many moles of ammonia are produced when 6 mol of hydrogen gas react with an excess of nitrogen gas?
What is 4 mol NH3?
Ammonia decomposes to produce nitrogen and hydrogen gases. How many moles of H2 can be formed by the decomposition of 0.145 moles of ammonia?
What is 0.218 mol H2?
Sodium hydroxide reacts with sulfuric acid (MM=98.1 g/mol) in a double replacement reaction. How many grams of the salt (MM=124 g/mol) will be formed from 200. g NaOH (MM=40 g/mol) and an excess of sulfuric acid?
What is 355 g Na2SO4?
Write the complete balanced equation for the following reaction: Lithium hydroxide pellets are added to a solution of sulfuric acid.
What is: 2LiOH + H2SO4 --> Li2SO4 (aq) + 2H2O (l)
This represents the number of moles of a substance involved in a chemical change.
What is a coefficient?
Hydrogen and oxygen gases react under a specific set of conditions to produce water. How many moles of oxygen would be required to produce 5.0 moles of water?
What is 2.5 mol O2?
Aluminum reacts with iron (III) oxide. How many grams of Aluminum are needed to react with 7.2 moles of iron (III) oxide?
What is 390 grams of aluminum?
A solution of copper (II) chloride is put in a beaker with a solution of sodium nitrate. If 15 g CuCl2 (MM=134.5 g/mol) reacts, how much (g) sodium chloride (MM = 58.5 g/mol) can be formed?
What is a no reaction (NR)?
Calcium bicarbonate decomposes when heated. How many grams of the gas will be produced if you start with 188 g of calcium bicarbonate (MM=162.11 g/mole)?
What is 102 g of CO2?