Final Exam Review Units 1-6

Front

What is the volume of magnesium needed for 0.672 moles?

Back

15.05L Mg

Front

Which element has a smaller atomic radius: potassium (K) or bromine (Br)?

Back

Bromine (Br) has a smaller atomic radius than potassium (K).

Front

What happens when an electron drops from a higher to a lower energy level in an atom?

Back

Emission of light occurs.

Front

What is the percentage composition of magnesium in Mg3(PO4)2?

Back

27.74% Mg

Front

Balance the equation: C3H8 + O2 --> ? CO2 + ? H2O

Back

1,5,3,4

Front

Define atomic radius.

Back

The distance from the nucleus of an atom to the outermost shell of electrons.

Front

What is the principle behind the emission of light from atoms?

Back

Light is emitted when electrons transition from higher to lower energy levels.

Front

How do you calculate percentage composition?

Back

(mass of element in 1 mole of compound / molar mass of compound) x 100.

Front

What is the molar volume of a gas at STP?

Back

22.4 L.

Front

Define molarity.

Back

Molarity is the number of moles of solute per liter of solution.