A water-treatment plant operator in Amsterdam needs 2400L of ozone to purify a day's worth of city water. How many grams of liquid oxygen is needed to produce the necessary amount of ozone?​

Acamcorder has a power rating of 17 watts. if the output voltage from its battery is 7 volts, what current does it use?units:

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

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 .