Which of the following is not true about covalent compounds?
a. they are made of molecules and can be gases, liquids, or solids.
b. they have low melting and boiling points.
c. they are good electrical conductors in all phases.
d. many are soluble in nonpolar liquids but not in water.

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.

Astudent states that 9.0 g of baking soda will form an unsaturated solution in 100 g of water. what do you need to know to decide whether this statement is correct? a. the temperature of the water and the molar mass of baking soda b. the percent by volume of the solution and the solubility of baking soda c. the temperature of the water and the solubility of baking soda at that temperature

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!