The table shows the percentages of hydrocarbons that are found in a sample of crude oil. Hydrocarbons Percentage paraffins 30 naphthenes 49 aromatics 15 asphaltics 6.0 Based on the given information, what is the best classification for this sample of crude oil? an element a pure compound a pure substance a mixture

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

a) the particles of the chair are strongly held together.

6.4 cm (max) - 25 cm (min)