A solution is prepare using 76.6 g of an unknown (nonelectrolyte) dissolved in 379.6 g of water. The boiling point elevation of the solution compared to water is measured to be 0.634°C. What is the molar mass of the unknown (in g/mol)? Some possibly useful constants for water are Kf = 1.86°C/m and Kb = 0.512°C/m.

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