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Terms in this set (11)

  • Can we determine if liquids A and B, solid C, and liquid D are elements or compounds from their reaction products resembling an acid-base reaction?

    No, we cannot tell if they are elements or compounds just from the reaction products.

  • Is melting an ice cube a physical or chemical process?
    Melting an ice cube is a physical process.
  • Select a chemical property of uranium.
    A chemical property of uranium is that it reacts with cold water.
  • Classify the properties of an unknown element: silvery liquid appearance, density 13.53 g/cm3, reacts with iodine to form red solid, freezes at −38.83 °C, forms yellow solid with nitric acid.
    Physical properties: silvery liquid, density, freezing point. Chemical properties: reaction with iodine, reaction with nitric acid.
  • Select the extensive property from temperature, volume, luster, concentration, hardness.
    Volume is an extensive property.
  • Convert 13°F to Kelvin.
    13°F is approximately \(263\) K.
  • True or False: Increasing the coefficient in scientific notation means the exponent is negative.
    False. Increasing the coefficient usually means a positive exponent.
  • What is the SI derived unit for kinetic energy and convenient units for a car and an electron?
    Energy unit is Joule (J). Convenient units: car's kinetic energy in MJ, electron's kinetic energy in pJ.
  • Convert 513 mK/s to K/s.
    513 mK/s equals \(5.13\times10^{-3}\) K/s.
  • How many significant figures are in 2.71×10^5?
    There are 3 significant figures.
  • What is the speedometer reading in mph and km/h and how many significant figures?
    115 mph and 185 km/h, both with 3 significant figures.