Which has the highest density, water at 0c, water at 4c, water at 6c, water at 8c

water at 0C

Explanation:

The colder the water is, the denser it is, so the water here with the lowest temperature, is 0C

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

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )