Final Exam- Chemistry Fall 2024

Front

What is the name of P2O5?

Back

diphosphorus pentoxide

Front

Ionic bonds form between what types of elements?

Back

Metal to Nonmetal

Front

The polarity of a bond is determined by...

Back

The difference in the electronegativities of the two atoms

Front

What type of change occurs when sugar is dissolved into Kool Aid?

Back

Physical change

Front

How many molecules are in 9.44 moles of AlCl3?

Back

5.68x10^24 molec AlCl3

Front

What is the definition of an ionic bond?

Back

A chemical bond formed between two ions with opposite charges.

Front

What is electronegativity?

Back

A measure of the tendency of an atom to attract a bonding pair of electrons.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the formula to calculate the number of molecules from moles?

Back

Number of molecules = moles × Avogadro's number (6.022 x 10^23)

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.