Label each as a chemical change (CC) or physical change (PC). a. Burning match b. Melting ice c. Boiling water d. Tearing a piece of paper e. Digestion of food f. Rusting of iron g. Dissolving salt in water h. Evaporating water from sugar water i. Adding food coloring to water j. Reacting sodium metal with water k. Breaking glass I. Melting glass m. Weathering copper (forms a green patina) n. Forming a precipitate o. Crystallizing rock candy

Classify each as a chemical property (CP) or physical property (PP). a. Mass b. Ease of rusting c. Volume d. Ductility (ability to be pulled into a wire) e. Malleability (ability to be hammered into a sheet) f. Color g. Taste h. Reactivity with water i. Flammability

Find the number of molecules in $158.1 \mathrm{~g}$ of $\mathrm{PbSO}_4$.

Explain exactly why the top blew off the Alka-Seltzer" cannon in the last chapter, now that you have an understanding of gas behavior.

Find the molecular mass for the following chemicals that decompose to produce gases and could be used in an airbag.

$$\mathrm{SnSO}_4$$

Liquid nitrogen has a density of $0.8081 \mathrm{~g} / \mathrm{mL}$. In order to have enough gaseous nitrogen to fill an airbag, you would need a mass of $68.5 \mathrm{~g}$ of liquid nitrogen. What volume would be needed for a holding tank for the liquid nitrogen?

What is inside the bubbles in boiling water? Explain why you answered as you did.

How many molecules of water are in $0.578$ moles of water?

The weather news gives the atmospheric pressure as $1.07 \mathrm{~atm}$. What is this pressure in $\mathrm{mm} \mathrm{Hg}$ ?

List common examples of changes of state in your daily life.

A 1.0-L tank of compressed gas is released to fill a $60.0-\mathrm{L}$ airbag at $0.95$ atm. What was the original pressure of the gas? Is this a safe way to store gas in the car before the airbag is needed? Why or why not?

Find the molecular mass for the following chemicals that decompose to produce gases and could be used in an airbag. Lead(II) phosphate

What would happen if an airbag was calibrated to work correctly at sea level, and then the car was driven to the top of a mountain, where the airbag deployed?

How many moles of oxygen are $7.58 \times 10^{20}$ molecules?