What is the mole to mole relationship between copper and zinc? cu2+(aq)+-> cu(s)+zn2+(aq)

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Classify this reaction: 2al+n2-> aln.