Experiments show that if the chemical reaction N2O5→2NO2+1/2O2, takes place at 45°C, the rate of reaction of dinitrogen pentoxide is proportional to its concentration as follows: -d[N2O5]/dt = 0.0005[N2O5] How long will the reaction take to reduce the concentration of N2O5 to 90% of its original value?

If a and −a are numbers on the number line, which expression must give the distance between them? a) 0 b) a c) |2a| d) |a|

Astudent found the solution below for the given inequality. |x-9|< -4 x-9> 4 and x-9< -4 x> 13 and x< 5 which of the following explains whether the student is correct? -the student is completely correct because the student correctly wrote and solved the compound inequality. -the student is partially correct because only one part of the compound inequality is written correctly. -the student is partially correct because the student should have written the statements using “or” instead of “and.” -the student is completely incorrect because there is no solution to this inequality.

Which additional information, if true, would to prove that δlmp ≅ δnmp by hl? check all that apply.