AP Chemistry Review: Unit 1

Front

What is the molar mass of acetic acid (CH₃COOH)?

Back

60.05 g/mol

Front

How do you convert moles to grams?

Back

Multiply the number of moles by the molar mass of the substance.

Front

What is the percent composition of an element in a compound?

Back

It is the mass percentage of that element in the total mass of the compound.

Front

Calculate the percent composition of carbon in capsaicin (C₁₈H₂₇NO₃).

Back

70.8% C

Front

What is molarity?

Back

Molarity (M) is the number of moles of solute per liter of solution.

Front

Which solution has the highest molarity: 1M, 2.5M, 3M, or 3.1M?

Back

3.1M

Front

What is ionization energy?

Back

The energy required to remove an electron from an atom or ion.

Front

How does ionization energy change across a period in the periodic table?

Back

Ionization energy generally increases from left to right across a period.

Front

What is the significance of the periodic table in chemistry?

Back

It organizes elements based on their atomic number, electron configuration, and recurring chemical properties.

Front

Define percent composition formula.

Back

Percent composition = (mass of element in 1 mole of compound / molar mass of compound) x 100%.