how much naoh must be added to make the ph of the solution 4.5?
(you can ignore the change in volume due to the added naoh).
show all the steps of calculations and explain your reasoning behind it.

given information:

2.2m solution of hcooh. you want the solution to have a ph of 4.5. the total volume of the solution is 250ml.
pka of hcooh = 3.77

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Which characteristics can be used to differentiate star systems? check all that apply.

Quiz1. which physical state of nitrogen has the highest entropy? a solid© b gasoc liquid