Al + 02 = A1203

1. What coefficient values will balance the reaction shown above? (Show your work for each set

of coefficients.)

A 2,3, 2

B 2, 1, 1

C 4,3,2

D 4,2,3

If 28 mL of 6.2 M H2SO4 was spilled, what is the minimum mass of NaHCO3 that must be added to the spill to neutralize the acid? Express your answer using two significant figures.

An open box of bandages is on the floor. bandage wrappers are found nearby. What is the chemical treatment?

During the process of cellular respiration energy is released from where?

When does a change in energy occur? 1. In some physical changes, but not all. 2. In every physical change, but not in a chemical change. 3. In every chemical or physical change.

Which of the following are true about mixing liquids in a separatory funnel? (choose all that apply) A. Everything should be done in your hood You should wear gloves B. Your hood sash should be between your face and the separatory funnel C.

The label of a gas cylinder has come off in your laboratory. You know that only one species of gas is contained in the cylinder, but you do not know whether it is hydrogen, oxygen, or nitrogen.

Give two example of compound that decompose to give off oxgyen gas

How many moles of gas are contained in a rigid, sealed, 5 L container, at 1 atm of pressure and 22 oc?

What makes up rubbing alcohol?

What are the similarities and differences between protons and neutrons