What volume of O2 gas is needed to react with 2.75 grams of propane?

How does the release of trapped gases in magma cause a volcano to erupt? a. they push the magma up the pipe and then are reabsorbed into the magma chamber. b. they cause the magma to change chemically into lava. c. the gases form vents that allow the magma to flow out. d. the gases rush out and carry the magma with them.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

Explain how scientists use geologic time to determine the age of landforms.