which two of these heats of reaction would be easiest and safest measure in the laboratory in which two are better obtain through reference sources? why?

In an investigation that uses the scientific method, which step immediately follows making a hypothesis? o summarizing the results o asking a question o making observations designing an experiment mark this and retum save and exit next submit

What is the molar mass of potassium nitrate, kno3

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?