a laboratory analysis of a sample finds it is composed of 38.8% carbon, 16.2% hydrogen, and 45.1% nitrogen. what is its empirical formula? give your answer in the form c#h#n#, where the number following the element’s symbol corresponds to the subscript in the formula. don’t include a 1 subscript explicitly. for example, the formula ch_2o would be entered as ch2o.

Factor out the greatest common factor. minus − 14 14p3 plus + 10 10p2 plus + 4 4p

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b

Berikan satu kepentingan terhadap komposisi udara di atmosfera bumi