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What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?
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Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.
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If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms
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Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife
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An exacuted glass vessel weighs 50 g when empty, 148g when filled with an liquid of density o.989/cc...
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