Me with this ! on the link that i have attached there are 6 pages scroll down to the 5th page because i need with number one and number three.
i am really confused.
25 points for this question

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

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg