Express each of the following numbers in exponential notation with correct significant figures: (a) 704 (b) $0.03344$ (c) $547.9$ (d) 22086 (e) $1000.00$ (f) $0.0000000651$ (g) $0.007157$

Classify each of the following as an element, a compound, or a mixture: (a) iron (b) oxygen (c) mercury oxide (d) pancake syrup (e) carbon dioxide (f) a substance composed of molecules each of which contains one hydrogen atom and one chlorine atom (g) baking soda (h) baking powder

Many of the items you purchase are mixtures of pure compounds. Select three of these commercial products and prepare a list of the ingredients that are pure compounds.

Explain the difference between a molecular element and a molecular compound.

Identify each of the underlined items as a part of either the macroscopic domain, the microscopic domain, or the symbolic domain of chemistry. For any in the symbolic domain, indicate whether they are symbols for a macroscopic or a microscopic feature. (a) The mass of a $\underline {\mathrm{lead \ pipe}}$ is 14 lb. b. The mass of a certain $\underline {\mathrm{chlorine \ atom}}$ is 35 amu. (c) A bottle with a label that reads $\underline {\mathrm{Al}}$ contains aluminum metal. (d) $\underline {\mathrm{Al}}$ is the symbol for an aluminum atom.

Explain how you could experimentally determine whether the outside temperature is higher or lower than $0^{\circ} \mathrm{C}$ $\left(32^{\circ} \mathrm{F}\right)$ without using a thermometer.

Express each of the following numbers in scientific notation with correct significant figures: (a) $711.0$ (b) $0.239$ (c) 90743 (d) $134.2$ (e) $0.05499$ (f) $10000.0$ (g) $0.000000738592$

Visit this PhET density simulation (http://openstaxcollege.org///16phetmasvolden) and select Mystery Blocks. (a) Pick one of the Mystery Blocks and determine its mass, volume, density, and its likely identity. (b) Pick a different Mystery Block and determine its mass, volume, density, and its likely identity. (c) Order the Mystery Blocks from least dense to most dense. Explain.

Visit this PhET density simulation (http://openstaxcollege.org/l/16phetmasvolden) and select Custom Blocks and then My Block. (a) Enter mass and volume values for the block such that the mass in kg is less than the volume in $\mathrm{L}$. What does the block do? Why? Is this always the case when mass < volume? (b) Enter mass and volume values for the block such that the mass in kg is more than the volume in L. What does the block do? Why? Is this always the case when mass > volume? (c) How would (a) and (b) be different if the liquid in the tank were ethanol instead of water? (d) How would (a) and (b) be different if the liquid in the tank were mercury instead of water?

Visit this PhET density simulation (http://openstaxcollege.org///16phetmasvolden) and select the Same Volume Blocks. (a) What are the mass, volume, and density of the yellow block? (b) What are the mass, volume and density of the red block? (c) List the block colors in order from smallest to largest mass. (d) List the block colors in order from lowest to highest density. (e) How are mass and density related for blocks of the same volume?

A large piece of jewelry has a mass of $132.6 \mathrm{~g}$. A graduated cylinder initially contains $48.6 \mathrm{~mL}$ water. When the jewelry is submerged in the graduated cylinder, the total volume increases to $61.2 \mathrm{~mL}$. (a) Determine the density of this piece of jewelry. (b) Assuming that the jewelry is made from only one substance, what substance is it likely to be? Explain.

Identify each of the underlined items as a part of either the macroscopic domain, the microscopic domain, or the symbolic domain of chemistry. For any in the symbolic domain, indicate whether they are symbols for a macroscopic or a microscopic feature. (a) The mass of a lead pipe is $14 \mathrm{lb}$. (b) The mass of a certain chlorine atom is $35 \mathrm{amu}$. (c) A bottle with a label that reads $\underline{\mathrm{Al}}$ contains aluminum metal. (d) $\underline{\mathrm{Al}}$ is the symbol for an aluminum atom.

Give the name of the prefix and the quantity indicated by the following symbols that are used with SI base units. (a) $\mathrm{c}$ (b) $\mathrm{d}$ (c) $\mathrm{G}$ (d) $\mathrm{k}$ (e) $\mathrm{m}$ (f) $n$ (g) p (h) $\mathrm{T}$

Give the name and symbol of the prefixes used with SI units to indicate multiplication by the following exact quantities. (a) $10^3$ (b) $10^{-2}$ (c) $0.1$ (d) $10^{-3}$ (e) 1,000,000 (f) $0.000001$