Which statements accurately describe binary star systems? check all that apply. have more than two stars,

have stars that are always visible

include large groups of stars have stars that might appear to wobble

often have one star that is brighter than the other

Explain why pure hydrogen cyanide does not conduct electricity, but become a conductor when it is dissolved in water? (at room temp, pure hcn exists as a volatile liquid)

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

Which of the following is a physical property flammability heat of combustion solubility and toxicity