the ph of lemon juice is 2.2. the ph of orange juice is 4.2. the concentration of hydrogen ions in lemon juice is the concentration of hydrogen ions in orange juice.

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Asample of freon gas has a volume of 2.23 liters, a pressure of 4.85 kpa, and a temperature of -1.36°c. calculate the volume at a pressure of 1.38 kpa and a temperature of 5.5°c. (show work)