A substance is found to

  1. Pretend you are a scientist and you just found a solid substance in the ground where you were digging. What types of tests would
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  2. a certain radioactive substance is decaying so that at time t, measured in years, the amount of the substance, in grams, is
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  3. Roshni, a forensic scientist, has ruled out several different drugs when testing a substance found in a car. She suspects that
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  4. A forensic scientist is given a white substance that is thought to be cocaine. The substance is found to have a percent
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  5. A forensic scientist is given a white substance that is thought to be cocaine. The substance is found to have a percent
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  6. Which of the following information can be found on an MSDS (material safety data sheet)? (Select all correct options)* 2 points
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  7. Suppose 1.0 mol of substance A reacts with 1.0 mol of substance B. to produce 2.0 mol of substance C. In a reaction, 2.4 mol of
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    2. Andrew asked by Andrew
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  8. A new substance is found to have a volume of 6mL and a mass of 12g. This substance will sink in water.
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  9. Substance A and substance B are mixed together. To separate the mixture, water is added, and substance A is filtered out. Then,
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  10. Substance A and substance B are mixed together. To separate the mixture, water is added, and substance A is filtered out. Then,
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