Which of the following is not easy to clean up? A. Oil B. Tempera C. Water Color D. Acrylic Which class of colorants requires a binder? A. Dyes B. Pigments C. Mauveine D. Light

You can get a "water clock", which works by simply adding water to it. How must it work?   a. The energy comes from the water itself.   b. It must have a solar cell to convert the water into hydrogen for a fuel cell.   c. The water creates the electrolytic solution in the clock's voltaic cell.   d. The polar nature of water produces small amounts of electricity.

Solutions make it easier to   A.handle chemicals safely   B.react chemicals with one another   C.control rate, extent, and type of reaction   D.all the above

1. Write balanced net ionic equations to explain the observations in the options assigned by your instructor. (All reactions are oxidation-reduction.) See the protocol on page 192. a) Option E Cues b) Option F

12.0 mL of a sodium hydroxide solution of unknown concentration was titrated with 16.1 mL of  0.209 M sulfuric acid solution. What is the concentration (M) of this unknown sodium hydroxide solution? a.0.140 b.80.8 c.3.21 d.0.561 e.0.280

Explain why Styrofoam a good is insulating material. Select one: a. Styrofoam is made of a polymer with high molecular weight. b. Styrofoam is plastic. c. Styrofoam is a polystyrene polymer that has trapped bubbles of air inside its macroscopic structure, and air is a good insulator. d. All options are correct.

What chemical concentration is being analyzed in this experiment. a. The amount of sodium bicarbonate in baking soda. b. The amount of acetic acid in commerical vinegar. c. The amount of citric acid in commerical lemon juice. d. The amount of lead in water.

Draw the structural formula for hydrogen cyanide, HCN, and state the type of bonds in a hydrogen cyanide molecule. A. None of the above B. 1 single bond and 1 triple bond C. 2 single bonds D. 1 single bond and 1 double bond E. 2 double bonds

A splint has been soaking in an unknown solution. The tip of the splint is put into a flame. Red-maroon streaks of colored light appears. What is the interpretation for this result? Select one: A. There is potassium (K+) present in the solution. B. There is lithium (Li+) present in the solution. C. There is sodium (Na+) present in the solution.

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