One day, you go gold mining and get gold ore. You then purify your compound. According to the math, you should have gotten a theoretical
yield of 45.22 g Au. In fact, you experimentally get 52.91 g Au. What is the
experimental yield that you obtained? *
52.91%
85.47%
100%
117.0%

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?

Element before carbon on the periodic table