Which demonstrates a positive impact of chemistry on society? understanding of how diseases are transmitted identification and naming of a new species building of particle accelerators development of cancer drugs

Development of cancer drugs.

Explanation:

Development of cancer drugs that is drug which nothing but compound  made up of atoms of different elements. The the branch which deals with atoms, compounds, reactions etc is chemistry. In this modern world diseases are like cancers are very common in aged and adults which can lead to the death if not paid attention or given medicine at right moment. By development of drugs to fight such deadly diseases in chemistry has positively impacted society.

Understanding of how the diseases are transmitted from one person another is study related to biological branch of the science.

Naming and identification of the new species is the study related to zoological and botanical sciences.

Building of the particle accelerators is the experimental setup which is related to physical sciences specially physics.

the temperature of the gas, in k, not celsius.