What is the molarity of a solution that has .8 mols of solute in .5 L of water?

1.6M

Explanation:

molarity = number of moles/number of Liters = 0.8 mol/0.5 L= 1.6 mol/L or 1.6M

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

c is the answer because when something is left after something evaporates that shows the chemical change.