The stops in a chemical reaction means A. Yields or makes B. Difference C. Sum D. Together

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

A250 g sample of water with an initial temperatureof 98.8 closes 6500 joules of heat. what is the finaltemperature of the water?