AP Chemistry Unit 4

Front

What is the limiting reactant in a chemical reaction?

Back

The limiting reactant is the reactant that is completely consumed and limits the amount of product that can be formed.

Front

How many moles of carbon dioxide (CO2) are produced from 2 moles of methane (CH4) in the reaction: CH4 + 2O2 -> CO2 + 2H2O?

Back

2

Front

What is the formula for calculating % yield?

Back

% yield = (actual yield / theoretical yield) * 100

Front

How many HCl molecules do you need to balance this equation? Mg + __HCl ---> MgCl2 + H2

Back

2

Front

Which type of reaction is: 2 NaBr + Ca(OH)2 → CaBr2 + 2 NaOH?

Back

Double Displacement

Front

Define stoichiometry in chemistry.

Back

Stoichiometry is the calculation of reactants and products in chemical reactions based on the conservation of mass.

Front

What is the mole concept?

Back

The mole is a unit that measures the amount of substance, defined as containing exactly 6.022 x 10^23 particles (atoms, molecules, etc.).

Front

What is the difference between an endothermic and exothermic reaction?

Back

Endothermic reactions absorb heat, while exothermic reactions release heat.

Front

What is the ideal gas law?

Back

The ideal gas law is PV = nRT, where P is pressure, V is volume, n is number of moles, R is the gas constant, and T is temperature.

Front

What is molarity?

Back

Molarity is a measure of concentration, defined as moles of solute per liter of solution (mol/L).