What quantity of potassium phosphate, in grams, is required to prepare 500.0 ml of solution where you the concentration of potassium is 0.100 M.

I did this problem and I got 10.6 grams but my computer says I did wrong. what steps am I missing. I'm confused now because I converted potassium to potassium phosphate.

Why does his teacher ask him to balance the equation by including the correct coefficient

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.

What can be found in the ionosphere