Author Archives: Mr. Leal

Chem Comm Warm-Up – 4/19/18

Determine the number of grams needed to make 150 mL of 0.20 M NaOH solution. If you remove 5.00 mL of 0.20 M NaOH solution and evaporate all the water, how many grams of NaOH will remain?

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Chemistry Warm Up – 3/9/18

Complete on separate paper and submit to the In-Box: Hydrogen gas reacted with oxygen gas producing water vapor in a closed container.  The system then established equilibrium. Write the balanced equilibrium equation. Write the equilibrium expression (Keq = ??). 0.505 … Continue reading

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Chem Comm Warm Up – 3/8/18

Complete on separate paper and submit to the In-Box when finished. What are 2 types of mixtures and how are they different?  Make a drawing to support your answers. What are 2 things that are needed for a chemical reaction … Continue reading

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Chemistry – Warm Up – 3/7/18

Nitrogen gas reacted with hydrogen gas producing ammonia gas (NH3) in a closed container.  The system then established equilibrium. Write the balanced equilibrium equation (remember diatomics?) Write the equilibrium expression (Keq = ??). 2.0 grams of nitrogen gas and 0.10 … Continue reading

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Chem Comm Warm Up – 3/6/18

Name 4 layers of the Earth’s Atmosphere and list 1 significant fact about each layer. What do you think is a mixture?  Give 2 examples.

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Chem Comm Warm Up – 2/27/18

Using your textbook, re-read page 148 about each of the 6 Air Quality examples and complete the following: Write a summary statement about each of the 6 examples. Write 1 question you have about each example. When finished, go to … Continue reading

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Chem Comm Warm Up / Review – 2/14/18

Define Boyle’s, Charles’, and the Ideal Gas Law. What is held constant in Boyle’s Law? Make a graph for both Boyle’s and Charles’ Law labeling both axes. Write the statements of the Kinetic Molecular Theory. (Look here). A ball has … Continue reading

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Chem Comm Warm Up – 2/12/18

12.5 grams of Neon gas is in a 2.0 L bottle at 745 torr pressure.  What is the temperature in K and C of the gas?  (Remember the steps: make list of givens, determine gas law, isolate unknown, make conversions … Continue reading

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Chem Comm Warm-Up – 2/6/18

Complete the following problems in your notes. A balloon with a volume of 3 L at 25 C is heated to 35 C. Make a drawing of the balloon before and after heating.  Then, determine the new volume? A 2 … Continue reading

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Chem Comm Warm Up – 2/1/18

Write the equation for Boyle’s and Charles’ Law. A basketball with a volume of 8.5 L at 1.0 atm pressure is taken up to a game in Denver where the pressure is 0.85 atm.  The volume in the ball will … Continue reading

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