How many molecules are in 83.2 g of chlorine gas (Cl2)? Group of answer choices
1. 14.2 x 10^24 molecules
2. 1.78 x 10^28 molecules
3. 1.42 x 10^24 molecules
4. 7.04 x 10^23 molecules

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