Which of the following names the quantity and correctly explains why that represents the astronauts weight

The biosphere of the earth is made up of what compound? organic or inorganic?

List and describe the neurological effects of the vocs and other air pollutants,as described by dr.theo colborn

Two solids are mixed in a flask and stirred. after a few minutes, the flask becomes cold. which of the following best describes this reaction? a. an exothermic reaction b. a combustion reaction c. an endothermic reaction d. a decomposition reaction