What is the difference between rna and dna
what does rna stand for
ex: dna stands for deoxyribonucleic acid.

Answer - 
RNA - Stands for (ribonucleic acid)

The difference between RNA and DNA is difference in sugar and the make up of the back bone. For example in DNA it has deoxyribose (hint) why its called deoxyribonucleic which is one less O2 then ribose.
In addition they have different back bones in which are in
DNA its adenine, guanine, cytosine, thymine.
RNA its adenine, guanine, cytosine, uracil. 

Can make a big difference trust me with those compounds.