AP Chemistry Unit 4

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 the equation: Mg + __HCl -> MgCl2 + H2?

Back

2

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 moles of CO2 are produced.

Front

How many valence electrons does nitrogen have?

Back

Nitrogen has 5 valence electrons.

Front

How many moles would be in 85mL of 0.75M KOH?

Back

0.06375 mol

Front

What is the definition of molarity?

Back

Molarity is the number of moles of solute per liter of solution (mol/L).

Front

What is the ideal gas law equation?

Back

PV = nRT, where P = pressure, V = volume, n = moles, R = ideal gas constant, T = temperature.

Front

What is the difference between an ionic bond and a covalent bond?

Back

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Front

What is the pH scale range?

Back

The pH scale ranges from 0 to 14, with 7 being neutral.

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction.