Before you can write down which solvent you used in each TLC, Professor Snape uses obliviate on you and now you no longer remember which solvent you used in each TLC. However, you have bottles of pure solutions of (1) diethyl ether, (2) dichloromethane, and (3) toluene on your bench. You discuss with Hermione which solvent you likely used in each TLC,

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.