Midterm Study Tool 2024

Front

How many molecules are present in a 135 g sample of Teflon (C2F4)?

Back

8.13 x 10^23 molecules

Front

What type of property is the boiling point of water?

Back

Intensive property

Front

What must an electron do to go from ground state to an excited state?

Back

Absorb energy

Front

What is the molar mass of AuCl3?

Back

303.3 g

Front

In which direction does heat flow?

Back

Always from warm to cold

Front

Define molar mass.

Back

The mass of one mole of a substance, typically expressed in grams per mole (g/mol).

Front

What is the formula for calculating the number of molecules in a sample?

Back

Number of molecules = (mass of sample in grams) / (molar mass) * Avogadro's number (6.022 x 10^23).

Front

What is an intensive property?

Back

A property that does not depend on the amount of substance present, such as boiling point or density.

Front

What is an extensive property?

Back

A property that depends on the amount of substance present, such as mass or volume.

Front

What is Avogadro's number?

Back

6.022 x 10^23, the number of atoms, ions, or molecules in one mole of a substance.