A 170 g sample of an aqueous alcohol solution contains 20.0% alcohol by
mass. What is the mass of solvent present in the solution?
20 g
34g
136 g
170 g

Agas is contained in a thick walled balloon when the pressure changes from 1.21 atm to 2.52 the volume changes from 3.75 l to 1.72 l and the temperature change from 293k to blank k

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

How many moles of oxygen react with 12 moles of aluminum