some iron filings were shaken with some copper (II) sulfate solution. The ionic equation for the reaction is :

a)write down any one change that you would observed during this reaction
b)which substance has been oxidized in this reaction
c) write down the full (not ionic) equation for this

a) The change here is that metallic iron is converted into ions and copper is deposited. This is called a displacement reaction.

b) is oxidised in this reaction.

c)$ \mathrm{Fe_{(s)}+ CuSO_{4(aq)} \rightarrow FeSO_{4(aq)} + Cu_{(s)}}$

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

58750.08068 is the answer i think