What kind of reaction occurs when potassium is placed in water? a. a single-displacement reaction b. a decomposition reaction c. a double-displacement reaction d. electrolysis

Iwill give extra points to who gets this right

Asample of air with a volume of 2.20m3 at a pressure of 105 kpa and a temperature of 30c is cooled to 10c and the pressure is reduced to 75.0 kpa. what is the new volume? 6.9 1.34 2.56 43.0 2.88

Which of the following are correct values for the ideal gas laws constant r