Chem Comm Warm Up – 1/26/18

The following data were collected during the temperature-volume laboratory activity using hot oil and capillary tubes:
Temperature (°C)        Length of trapped air in the tube (cm)
142                                  8.2
113                                   7.6
95                                    7.2
61                                    6.5
42                                    6.1
27                                    5.9

  1. Convert the Temperatures to Kelvin (K)
  2. The temperature was changed by the chemist.  Which axis would this be?
  3. Using graph paper, construct a graph using the Kelvin temp and the Length in cm (which is the volume).  Use Zero for the lowest values.
  4. Determine the temperature in Kelvin and Celsius where the volume would be Zero.
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Chem Comm Warm Up – 1/18/18

Use the Periodic Table and a calculator to help you convert the following.  Please show all work.

  1. Convert 685 torr to atm
  2. If a balloon with a volume of 10.5 L and pressure of 765 torr is pushed to the bottom of a pool with a pressure of 4 atm, what will be the new volume in L?
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Chem Comm Warm Up – 1/9/18

Welcome back and Happy New Year!  Now is a time to reflect on the past and make some changes to improve for the new year.  Please write the questions and answer the following in your notes.

  1. What worked well for you this past semester in this class?
  2. What 3 specific things (study more is not specific) could you do to improve in this class?
  3. List and describe 3 class rules.
  4. When are cell phones allowed to be used in this class?

 

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Chem Comm Warm Up – 12/7/17

On Separate Paper, Balance the Equations using the smallest numbers for coefficients. Turn in to In-Box when finished.

  1. __H2   +  __Cl2  –>  __HCl
  2. __Na   +  __F2  –>  __NaF
  3. __CH4  +  __O2  –>  __CO2  +  __H2O
  4. __CaBr2  +  __FeCl3  –>  __FeBr3  +  __CaCl2
  5. __C3H7OH  +  __O2  –>  __CO2  +  __H2O
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Chem Comm Warm Up – 12/5/17

  1. Write the formulas for the following:
    1. Sodium Hydroxide
    2. Sodium Carbonate
    3. Lead(II) Nitrate
  2. Sodium Hydroxide reacts with Lead(II) Nitrate to make 2 products.
    1. Determine the formula of each product.
    2. Write and balance the chemical equation.
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Chem Comm Warm Up – 12/1/17

  1. Write the formula for the following:
    1. Calcium Fluoride
    2. Iron(III) Chloride
    3. Potassium Iodide
  2. Lithium Oxide reacts with Sodium Phosphide to make 2 products.
    1. Write the chemical formulas for the reactants
    2. Write the chemical formulas for the products
    3. Write a chemical equation and then balance it.
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Chem Comm Warm Up – 11/29/17

  1. Define and give 2 examples for the following Terms:
    1. Chemical Formula
    2. Diatomic Molecule
  2. How many atoms of each element are in the formula Ca3(PO4)2
  3. What is a Chemical Equation?
  4. What does it mean to be Balanced?
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Chem Comm Warm Up – 11/16/17

  1. Determine the molar mass of Ca(NO3)2.
  2. Determine the Percent Nitrogen in Ca(NO3)2.
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Chem Comm Warm Up – 11/7/17

On a separate sheet of paper, complete showing all your work and turn in to the inbox.  You will need a calculator and Periodic Table and can use your notes.

  1. A chemical compound has a mixture of 1 copper, 1 sulfur, 10 hydrogens and 9 oxygens.  The formula for the compound is CuSO4•5H2O.  Determine the molar mass for the compound.
  2. The percent of water in the compound for number 1 is 36.08%.  Prove it!
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Chem Comm Warm Up – 10/19/17

Pick 3 metals and 3 nonmetals and do the following:

  1. Write the symbol of the atom and how many electrons it has
  2. Write the symbol of the ion and how many electrons it lost or gained
  3. Label the ion as a cation or anion
  4. Create 9 compounds with your 6 ions and write their formulas and their names.

Example: 1 metal = Barium and 1 nonmetal = Astatine

  1. Ba = 56 electrons and At = 85 electrons
  2. Ba2+  lost 2 electrons    and    At1-    gained 1 electron
  3. Ba2+  is a cation    and    At1-    is an anion
  4. formula = BaAt and the name is Barium Astatide
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