A rosary is used by Catholics-it's a necklace.
If you are talking about actually making a rosary, that would depend entirely on what kind of rosary you were making, what materials you were using, and how skilled you were. If you are talking about praying an average rosary (one set of five mysteries), then your prayer should take about twenty minutes if you are doing it correctly. See the related question below on how to properly pray the rosary.
Chemistry is a part of science.
What are the chemistrt related courses and how it is related
See the related links for a Google Image search that will show you lost of images of Rosary sets.
Chemistry can be considered to be the study of chemicals.
It is sort of. If you include organic chemistry it is all about the studies of chemistry in life and is related to the environment.
Many discoveries in chemistry have influenced history.
Chemistry is a learning discipline and is learned at school.
Physics offer an important support to chemistry.
Any link between tourism and chemistry.
Yes, it is very important for chemistry.
Chemistry is the study of matter chemical properties.