The air in our atmosphere contains, by volume, approximately 78% nitrogen, 21% oxygen, 1% argon, and all other gases at trace amounts (discounting pollution).

a. suppose we take the partial pressure of nitrogen in denver, co, which is about 0.686 atm. what is the total air pressure above the "mile-high city"?
b. further suppose we take this measurement on the hottest day of the year (99°f), using a 250 ml gas chamber barometer. how many moles of argon are in the sample taken?

Does the temperature affect the solubility of sugar and salt in water? if it does tell me like different temperatures with different solubilities so i can sketch down a graph

Which of the following statements about acidic water is true? a. acid has no effect on the h, o molecules. b. the solution contains a larger number of oh ions than h, o ions. c. the solution contains a larger number of h, o ions than qh ions. d. the solution contains an equal number of h, o ions and oh ions. none of the above e.

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.