After a hypothesis is tested a scientist must do what next ?

that tool would be a compass

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl