Copper (Cu) is a metal that is commonly used for electrical wiring. Determine both the number of moles of atoms and the number of atoms in a 1.35 g samp of copper
HOW DO WE GET THERE?
How many moles are present in the 1.35-g sample of copper?
mol Cu

Answer is in the file below

cutt.ly/tz3yDpb

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