Explain briefly how an infrared spectrometer works. ! : (

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.

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Nan element’s square on the periodic table, the number with the greatest numerical value represents the