Chemistry Lab Week 2 Assignment

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  1. Utilizing the information on the periodic table on the first page of the textbook, identify 3 or more elements that are found on food items on a daily basis, give 2 examples for each element.
  2. Write one to two paragraphs specifying which ions are found in the body and sources to get them
 
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Chemistry Lab Week 2 Discussion

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 Discuss among peers  the effect of mercury in the human body.

 
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Chemistry Lab Week One Discussion

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 Make a brief description of one of the titration methods analyzed in this laboratory session and provide one practical example of the use of this method in our daily life. 

 
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Chemistry Week 2 Assign 1

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  1. Utilizing the information on the periodic table on the first page of the textbook, identify 3 or more elements that are found on food items on a daily basis, give 2 examples for each element.
  2. Write one to two paragraphs specifying which ions are found in the body and sources to get them
 
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Chemistry Week 2 Discussion 1

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 Discuss among peers  the effect of mercury in the human body, each student most post an original post and answer to at least one of your peers. 

 
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Chemistry Week 3 Discussion 1

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 Discuss the different medical applications of radioactivity. 

 
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Chemistry Week 3 Learning Activities

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Ionic and Molecular Compounds

1. Name each of the following molecular compounds

a. CO2

b. N2O

c. P2O5

d. N2S3

e. CF4

2. Write the formula of the following molecular compound

a. Carbon tetrachloride

b. Sulfur dioxide

c. Phosphorus pentafluoride

d. Dinitrogen tetroxide

e. Chlorine dioxide

3. Classify each of the following as ionic or molecular and give its name

a. Na2SO4

b. Fe(OH)3

c. CCl4

d. OF2

e. CaS

4. Identify the group in the periodic table of the element X in each of the following ionic compounds

a. XSO4

b. XF3

c. XCl

d. XO

e. X2CO3

5. Classify the bonds in each of the following compounds as ionic bond, polar covalent bond, or non polar covalent bond

a. MgS

b. H-Cl

c. Br-Br

d. H-O-H

e. NaCl

 
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Chemistry Week One Assign

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  1. Answer the following question in one paragraph: Why can physical methods be use to separate mixtures but not compounds?
  2. Obtain a food item that has a nutrition label. From the information on the label, determine the number of grams of carbohydrate, fat and protein in one serving. Using the caloric values calculate the total calories for one serving
 
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Chemistry Week One Learning Activities

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1. Identify the following as an observation (O), a hypothesis (H), an experiment (E), or a conclusion (C).2

a. While conducting a new procedure to peel oranges, John noted that it was faster than the traditional one

b. After repeating a new procedure to peel oranges several times, John realized that it is faster than the traditional procedure.

c. John decided to repeat a new procedure to peel oranges several times to evaluate whether it was faster than the traditional one.

d. John believes that a new procedure to peel oranges will be faster than the traditional one 

2. Solve each of the following for x

a.   x/2 + 2 = 5

b.  4x – 8 = 24

c. 3x + 4 = 13

d. 7a = 49

e. 2b + 5 = b + 9

3. Write the following in scientific notation

a. 4900000

b. 0.0000347

c. 676000000

d. 0.00000908

e. 0.00050

f. 5006000

4. Which number in each of the following pairs is larger?     

a. 2.3 x 107  or  65300

b. 0.0004  or  5.0 x 10-6

c. 2.54 x 103 or  254

d. 4.5 x 10-5  or  7.4 x 10-6

5. How many significant figures are in each of the following?

a. 2.0004

b. 0.00000345

c. 42.000

d. 43000

e. 0.00004200

6.  A sculptor has prepared a mold for casting a bronze figure. The figure has a volume of 675 mL. If the bronze has a density of 7.8 g/mL, how many ounces of bronze are needed in the preparation of the bronze figure?

 
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Chemistry Week Week 2 Learning Activities One

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1. Classify each of the following as an element, a compound, or a mixture

a. Milk

b. Diamond (pure carbon)

c. Pure water (H2O)

d. Sea water

e. Air

2. Identify each of the following as solid, liquid, or gas.

a. Ice

b. Air in a tire

c. hot tea in a cup

d. A bar of gold

e. water in a shower

3. Identify each of the following as a physical or chemical change.

a. Melting ice

b. Wood burns in wood stove

c. Wood is chopped for the fire place

d. In contact with the air, a copper pipe becomes green

e. When a bar of zinc is submerged in hydrochloric acid, a gas bubbles form this mixture

4. Classify the following mixtures as homogenous or heterogeneous

a. Tea

b. sugar completely dissolved in water

c. Water with sand

d. Steel (a mixture of iron and carbon)

e. Air

5. Give the period and group numbers for each of the following

a. Chlorine

b. Calcium

c. Helium

d. Copper

e. Sulfur

f. Xenon

6. Write the name and symbol of the elements with the following atomic number

a. 11

b. 17

c. 30

d. 24

e. 6

f. 34

g. 19

h. 26

7. For the following atoms determine the number of protons, neutrons, and electrons.

a. 23Na

b. 35Cl

c. 78Rb

d. 14C

e. 32S

8. Place the following elements in order of increasing atomic size

a.  Ca, Ra, Be, Sr, Mg

b. Ge, Fe, Cr, Mo, Br

9. Classify the following elements as alkali metal, alkali earth metal, transition element or a halogen

a. Rb

b. I

c. Fe

d. Be

e. Au

f.  F

10. Write the group number and electron arrangement for each of the following

a. Phosphorus

b. Nitrogen

c. Magnesium

d. Aluminum

e. Chlorine

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