An organic compound (A) is composed of carbon, hydrogen a nd nitrogen, with carbon constituting over 60% of the mass. It shows a molecular ion at m/z=112 amu in the mass spectrum. Answer the following questions.

1. Write a plausible Molecular Formula for compound A.

2. How many Rings + Double Bonds must be present in compound A?

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