A balloon of helium occupies 11.5 L at 23.0 °C and 755 mmHg. What temperature was it initially, if it occupied 8.75 L and was in a freezer with a pressure of 712 mmHg?

What can be done to make a solid solute dissolve faster in a liquid solvent?

2. what two items do autotrophs take from the environment to produce their food? 3. what are the two items that are released during transpiration from leaves? 4. what are the two membranes of the system? a.what are the two stages of photosynthesis? what are the two parts of photosynthesis?

Aplanet similar to earth has four moons roughly the same distance away. the moon that will most affect tides on the planet is the one that has the greatest a) mass. b) volume. c) density. d) amount of water.