How would your results . the r value) be affected if you did not wait for the test tube to cool before measuring the volume of water? explain your answer. 2. a mixture of gases at 760 mm hg pressure contains 65,0% nitrogen, 15.0% oxygen, and 20.0% carbon dioxide, by volume. what is the partial pressure of each gas in mm of hg? 3. assume that 1.40 g of a kcio, /mno, mixture (65% kcio, by weight) was decomposed in an experiment similar to yours and all final measurements were made at 22°c on a day when the atmospheric pressure was 716 torr. what is the pressure of the o, if the vapor pressure of water at 22 °c is 19.827 mm hg? b. how many moles of o, should have been evolved? c. what volume of o, would be evolved under the experimental condition? d. what is the stp volume of this 0,?