Which of the following is an example of how a scientist might use a model? a) a stopwatch is used to time the rate of a chemical reaction b) the end of a slinky is moved vertically up and down to simulate a wave c) a microscope is used to magnify a group of cells on a slide d) a wrench is used to tighten a nut onto a piece of wood p. s.- this is science not chemistry
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Which diagram represents the phase tha occurs after a solid melts?
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Which of the following statements best explains why chemistry is testable a) it can measure data by experiments b) it cannot add new evidence c) it cannot be verified d) it is biased
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T(s) in2os] (m) 0 185 2.39 546 1.90 725 1.70 the decomposition of n205 can be described by the equation 2.68 given these data for the reaction at 45°c in carbon tetrachloride solution, calculate the average rate of reaction for each successive time interval. ntr s to 185 s 185 s to 546 s 546 s to 725 s number number number reaction rate: m/s m/s m/s
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Which of the following is an example of how a scientist might use a model? a) a stopwatch is used t...
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