A 3.50 L gas sample at 20°C and a pressure of 86.7kPa expands to a volume of 8.00L. The final pressure of the gas is 56.7kPa. What is the final temperature of the gas in degrees Celsius?

Which position represents spring in the southern hemisphere? a) b) c) d)

Light waves travel than sound waves.

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.