Which of the following best explains a renewable resource? a resource that is free to use

a resource found in the earth's atmosphere

A resource that is found in limited amount.

A resource that does no run out because it is naturally replaced

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Is the flow of energy during vaporizing more like the flow during melting or during freezing

Idid a lab for chemistry where we put nails in a copper (ii) chloride solution. 1. why did the reaction stop? which reactant was used up? how do you know? 2. describe what was happening to the atoms of iron and copper during the reaction. what is this type of reaction called? 3. what would happen to the ratio of copper to iron if you had placed more nails in the beaker? if you had let the reaction go for less time? 4. what is the accepted ratio of copper atoms to iron atoms in this reaction? account for differences between your experimental value and the accepted value. write the balanced equation for the reaction.