How much heat energy is required to boil 87.7 g of ammonia, nh3? the molar heat of vaporization of ammonia is 23.4 kj/mol.

1. list three scientific reasons cockroaches may fly.

Which common material is an example of a polymer? (25 pts) a. steel b. plastic c. petroleum d. rubbing alcohol

Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.