How is it possible for scientists to do studies about things that happened?

Why is isn't it chemical change if you mixed paint together?

A mixture with particles that settle out is classified as a (an

A certain chemical reaction releases 362. kj of heat energy per mole of reactant consumed. Suppose some moles of the reactant are put into a calorimeter (a device for measuring heat flow). It takes 4.

How do ethical guidelines make science safer?

Precision is defined as how_the measured values are to one another. accurate common reproducible 2 pts D Question 3 An object with a mass of 0.281 kg and density of 452 g/cm measures 37.0 mm in length and 15.2 mm in width.

In Hooke's law, if a large force produces a small displacement, what does that say about the spring?

What best describes the bonding in a water molecule? An oxygen atom shares an electron pair with each H atom. An oxygen atom shares a single electron with each H atom. An oxygen atom receives an electron from each H atom.

What does the mass number tell us?

How is shielding effect related to atomic radius?

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