Chemistry Semester Exam

Front

What is the electron configuration of hydrogen?

Back

1s¹

Front

How many grams are in 5.6 moles of H2O?

Back

The answer is 100.8 grams (5.6 moles x 18.02 g/mol).

Front

What is the mass in grams of 5.90 mol C8H18?

Back

The mass is 674.13 g.

Front

What is the dot diagram of oxygen (O)?

Back

Oxygen has 6 valence electrons, represented as :O:.

Front

What is the name of SnO2?

Back

Tin (IV) Oxide.

Front

What is the molar mass of water (H2O)?

Back

The molar mass is 18.02 g/mol.

Front

What is the definition of a mole in chemistry?

Back

A mole is a unit that measures the amount of substance, defined as 6.022 x 10²³ particles.

Front

What is the significance of the periodic table in chemistry?

Back

The periodic table organizes elements based on their atomic number and properties.

Front

What is the formula for calculating the number of moles?

Back

Number of moles = mass (g) / molar mass (g/mol).

Front

What is the difference between ionic and covalent bonds?

Back

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