Need asap how many particles can be stored in a 4.0 l container at room temperature (23 c) and standard atmospheric pressure (101.3 kpa)? 2.1 moles 0.47 moles 6.1 moles 0.16 moles

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

What energy is it when you flip on a switch on a lamp

Athe top of a hill, an athlete on a skateboard has x joules of mechanical energy. how much mechanical energy will she have at the bottom of the hill? ignore the effects of friction.