What is the oxidation number of a pure element?

Explain what happens to a gas when it is put into a container?

The typical reaction of the saturated hydrocarbons is: substitution addition combustion hydrogenation

Describe how you would make 1.0 l of a supersaturated solution of cdi2

In a bottle of coke which would you expect to be higher, the concentration of H + or the concentration of OH+? Why?

Explain why crushing a can is physical change and not chemical

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.

Under what condition is decompostion the fastest? Under what condition is it the slowest?