a sample of propane occupies an initial volume of 250.0L at a pressure of 125 kPa. find its volume at 100.0kPa. What gas law is needed for this problem?

What volume would 2.25 moles of ne has occupy at stp?

Which of the following isotopes has the same number of neutrons as phosphorus-31?

Using this reversible reaction, answer the questions below: n2o4 2no2 (colorless) (reddish-brown) -as the temperature increased, what happened to the n2o4 concentration? -was the formation of reactants or products favored by the addition of heat? -which reaction is exothermic? right to left or left to right? -if the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct? n2o4 2no2 + 14 kcal n2o4 2no2, hr = +14 kcal n2o4 + 14 kcal 2no2 n2o4 2no2, hr = -14 kcal