Analysisusing the combined mass of the solids you recovered, calculate the percent recovery (see appendix ii) from the separation, based on the total mass of the original amount you weighed. identify each compound on the tlc plate and calculate the rf for each spot on your tlc plate. which spot (lower or higher) is benzophenone? which is benzoic acid? rf benzoic acid:

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

thats a little if u want the answer just look it up on google thats what i do haha : )