Which scientist discovered the existence of a center to the atom?

Which of the following statements is TRUE? a) Particles of different masses have the same average speed at a given temperature. b) The larger a molecule, the faster it will effuse.

If an isotope of an element has 40 neutrons and a mass number of 79, how many electrons must it have?

How do water molecules move?

Why does metamorphic to rocks rarley form at Earth's surface?

Americium-241 is used in smoke detectors. It has a first-order rate constant for radioactive decay of k = 1.6x10^-3yr-1. By contrast, iodine-125, which is used to test for thyroid functioning, has a rate constant for radioactive decay of k = 0.

How might we create the best possible solution to a problem?

A runner at a track meet completes exactly one lap around a 400 m track. what is the distance? what is the displacement?

Match the following with their correct molecular weight. 2-butanone Propyl acetate 4-methyl-2-pentanone Butyl acetate Methanol Ethanol A. 46.07 g/mol B. 116.16 g/mol C. 102.13 g/mol D. 100.16 g/mol E. 32.04 g/mol F. 72.11 g/mol

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Explain how using dimensional analysis could have prevented this crash