1. A 67 kg water-skier is being pulled by a speedboat. The force causes her to accelerate at 3.8 m/s2. Calculate the net force that causes this acceleration. Show your work and answer in
the box below. Be sure to use the correct place value.

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

4. propanol and isopropanol are isomers. this means that they have a) the same molecular formula but different chemical properties. b) different molecular formulas but the same chemical properties. c) the same molecular formula and the same chemical properties. d) the same molecular formula but represent different states of the compound

Consider the balanced equation below. pcl3+cl2-> pcl5 what is the mole ratio of pcl3 to pcl5