RC CHM 1100C General Chemistry Mass and Density Questions

  • Instructions: Answer each question using complete sentences and in your own words. For mathematical questions please show your work, answer using the correct number of significant figures, and circle or highlight your answer. A couple of problems are solved for you to serve as models



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    Scientific Law

    Scientific Theory

    Mass and Density

    Instructions: Answer the following questions about mass and density.

    What is the relationship between mass, volume and density?

    A 8 gram metal object displaces 2 mL of water in a graduated cylinder. What is the density of the metal object?

    What is the mass of an object with a volume of 4 L and a density of 1.25 g/mL?

    What is the volume of an object with a mass of 7.9 grams and a density of 1.28 g/mL?

    Energy and Heat Capacity

    Instructions: Determine if the results of the following word problems adhere to the Law of Conservation of Mass.

    A chemist combines 4.9 g of hydrogen gas with 9.4 grams of nitrogen gas to form 11.4 g of ammonia. 2.9 g of nitrogen gas is remaining.

    A chemist combines 33 g of methane with 289 g of oxygen to form 189 g of carbon dioxide and 30 g of water.

    Ice melting

    Water vapor condensing into liquid water

  • Baking bread
  • What is the final temperature of water given an initial temperature of 28
  • ?C
  • , a mass of 9 g, and heat (q) of 184 J (Specific Heat of water = 4.184 )?

  • What is the specific heat of a metal with a mass of 14.0 g, heat of 3.45 kJ and a change in temperature of 3.2 ?
  • Instructions: Determine if the following chemical changes are exothermic or endothermic. Include a brief explanation
  • Instructions: Convert the following temperatures from one temperature scale to another. Please remember to show your work for all mathematical solutions.

    37 ?C

  • K
  • 210 ?F


  • 49 ?F
  • K

    Instructions: For each word problem, find the temperature.

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