Stoichiometry

Mix

100

This is the branch of chemistry that deals with mass relationships in compounds and reactions.

What is Stoichiometry

200

In a chemical reaction, these numbers can be used to determine the mole ratio of any reactants and/or products.

What are coefficients?

300

These are the units of molar mass.

What is g/mol.

400

In the reaction represented by the equation 2Al2O3 --> 4Al + 3O2, this is the mole ratio of Aluminum to Aluminum Oxide.

What is 2:1

Moles

100

This is the coefficient of hydrogen gas in the balanced form of the following reaction: H2 + O2 --> H2O

What is 2

200

This is the coefficient in front of nitrogen gas in the correctly balanced form of the equation: (NH4)NO2 --> N2 + H2O

What is 1

300

This is the amount of moles of water that are made from complete reaction of 2.2 moles of oxygen gas with hydrogen gas Given the reaction: 2H2 + O2 → 2H2O

What is 4.4 moles

400

This is the amount of moles of H2 that can be made from the complete reaction of 3.0 moles of Al Given: 2 Al + 6 HCl → 2 AlCl3 + 3 H2

What is 4.5 moles

Stoich

100

This is how many moles of LiOH are required to react 20 moles of CO2 in the following reaction: CO2 + 2LiOH --> Li2CO3 + H2O

What is 40 moles.

200

How many moles are present in 34 grams of Cu(OH)2?

What is 0.35 mol Cu(OH)2?

300

This is the amount of lithium nitride produced if 5.50g of Lithium reacts with an excess of nitrogen gas. The reaction: 6Li + N2 --> 2Li3N

What is 9.16 grams

400

This is the amount of magnesium chloride produced (in grams) if 20.0 g of magnesium react with excess hydrochloric acid Mg + HCl -------> MgCI2 + H2

What is 78.3 grams

Mass

100

Mg + 2HCl --> MgCl2 + H2 How many grams of hydrogen will be produced if we start with 2 moles of hydrochloric acid and excess magnesium?

What is 2 g H2?

200

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?

300

2KClO3 --> 2KCl + 3O2 How many grams of KCl are produced if 5.0 g of KClO3 is decomposed?

What is 3 g KCl?

400

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?

Misc.

100

What is 6.022 x 10^23?

What is Avogadro's number?

200

A conversion factor that relates the amounts in moles of any two substances involved in a chemical reaction.

What is mole ratio?

300

States that mass is neither created nor destroyed during ordinary chemical or physical reactions. (This is why we balance chemical equations!)

What is the law of conservation of mass?

400

This is the molar mass of Copper(II) Sulfate.

What is a 160 g/mol?