Author Archives: Mr. Leal

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. __H2   +  __Cl2  –>  __HCl __Na   +  __F2  –>  __NaF __CH4  +  __O2  –>  __CO2  +  __H2O __CaBr2  +  __FeCl3  –>  __FeBr3  … Continue reading

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Chem Comm Warm Up – 12/5/17

Write the formulas for the following: Sodium Hydroxide Sodium Carbonate Lead(II) Nitrate Sodium Hydroxide reacts with Lead(II) Nitrate to make 2 products. Determine the formula of each product. Write and balance the chemical equation.

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Chem Comm Warm Up – 12/1/17

Write the formula for the following: Calcium Fluoride Iron(III) Chloride Potassium Iodide Lithium Oxide reacts with Sodium Phosphide to make 2 products. Write the chemical formulas for the reactants Write the chemical formulas for the products Write a chemical equation … Continue reading

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Chem Comm Warm Up – 11/29/17

Define and give 2 examples for the following Terms: Chemical Formula Diatomic Molecule How many atoms of each element are in the formula Ca3(PO4)2 What is a Chemical Equation? What does it mean to be Balanced?

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Chem Comm Warm Up – 11/16/17

Determine the molar mass of Ca(NO3)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. A chemical compound has a mixture of 1 copper, 1 … Continue reading

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Chem Comm Warm Up – 10/19/17

Pick 3 metals and 3 nonmetals and do the following: Write the symbol of the atom and how many electrons it has Write the symbol of the ion and how many electrons it lost or gained Label the ion as … Continue reading

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Chem Warm Up – 10/16/17

Write the full and noble gas electron configuration for: Calcium Oxygen Copper Chlorine How many valence electrons would calcium and oxygen have? What are the charges if calcium and oxygen were to become ions?

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Chem Warm Up – 10/12/17

What were the positive ions for the unknown samples for the flame test lab? Describe the color of flame observed for Copper. Why do you think it produced that color? What is the full electron configuration for Copper?

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Chem Comm Warm Up – 10/5/17

Work on your own paper: Determine the number of Protons, Neutrons, Electrons, Mass Number and Atomic Mass for each: Sodium-22 Phosphorus-30 Copper-63 Write the Nuclear Symbol for the elements from number 1 above.

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