PHY102 Week 7 | Computational Physics in Physics - Grand canyon university
Week 7
assignment
Chemistry Exercises PHY-102: Chemistry Exercises Complete the following exercises.
1. Which of
the following are physical properties? (Select all that apply)
A. Color
B. Hardness
C. Density
D. Flammability
E. Conductivity
F. Reactivity
with other materials
2. Which of
the following describe a physical change? (Select all that apply)
A. Photosynthesis
B. Evaporation
of alcohol when a table is wiped with an alcohol swab
C. Burning
of firewood
D. Rusting
of iron
E. Breaking
a glass
F. Melting
ice
3. Which of
the following are chemical properties? (Select all that apply)
A. Texture
B. Toxicity
C. Conductivity
D. Density
E. Flammability
F. Reactivity
with other materials
4. Which of
the following describe a chemical change? (Select all that apply)
A. Melting
of ice
B. Evaporation
of alcohol when a table is wiped with an alcohol swab
C. Burning
of firewood
D. Rusting
of iron
E. Breaking
a glass
F. Cooking
an egg
5. Match the
following substances with the best classification:
1. Magnesium
2. Salt
water
3. Blood
4. Carbon
dioxide
5. Soil
sample
A. Compound
B. Element
C. Solution
D. Heterogeneous
mixture
E. Suspension
6. Which of
the following illustrations best illustrate an element, a compound, and a mixture. Provide an explanation for your choices. .
7. Describe
a method to separate the substances in a solution.
8. Distinguish
between a saturated and an unsaturated solution.
9. Match the
following:
1. Sodium
chloride, NaCl
2. Oxygen,
O2
3. Methane,
CH4
4. Lithium
5. Air
A. Element
B. Solution
C. Diatomic
gas
D. Ionic
compound
E. Covalent
compound
10. Electron
dot diagrams are a way to illustrate the number of valence electrons for an element. The symbol for the element is surrounded by a dot for each valence electron. Match the following electron
dot diagrams with an element:
1. Electron
dot diagram #1
2. Electron
dot diagram #2
3. Electron
dot diagram #3
4. Electron
dot diagram #4
A. Sodium,
Na
B. Aluminum,
Al
C. Flourine,
F
D. Nitrogen,
N
11. For the
following questions consider a compound of calcium and chlorine. a. What type of bond do calcium and chlorine form? b. Describe how this bond forms. c. What is the chemical formula for the compound? Explain.
12. For the
following questions consider a water molecule, H2O. a. What type of bond is formed between the oxygen and the hydrogen atoms? b. Describe how these bonds form. c. Explain why there are two hydrogen atoms for each oxygen atom.
13. For the
following questions consider a piece of copper wire. a. What type of bond is formed between the copper atoms? b. Describe how these bonds form. c. Explain why copper is a good electrical conductor.
14. Explain
why food stays fresh longer when kept in the refrigerator.
15. In the
stratospheric level of the atmosphere there is a high level of ozone, O3. This ozone absorbs much of the ultraviolet light from the sun and thus protects life in the surface of the Earth from harmful high level of ultraviolet radiation. Explain why one chlorofluorocarbon (CFC) molecule in the ozone layer is capable of breaking down hundreds and even thousands of ozone molecules?
16. Balance
the following chemical reaction by placing the proper coefficients in front of each reactant and in front of the product. a. What is the coefficient on line (a)? b. What is the coefficient on line (b)? c. What is the coefficient on line (c)?
17. Acetylene
gas (C2H2) burns in the oxyacetylene torch for welding. Balance the chemical reaction by placing the proper coefficients in front of each reactant and each product. a. What is the coefficient on line (a)? b. What is the coefficient on line (b)? c. What is the coefficient on line (c)? d. What is the coefficient on line (c)?
The remaining questions are multiple-choice questions:
18. What is a
substance made up of only one type of atom called?
A. An
element
B. A mixture
C. A
solution
D. A
compound
E. A nucleus
19. Which of
the following is a solution?
A. Table
salt
B. Nitrogen
C. A vinegar
and oil salad dressing
D. Copper
wire
E. A 14
karat gold ring
20. Which of
the following is a heterogeneous mixture?
A. Table
salt
B. Air
C. A vinegar
and oil salad dressing
D. Steel
E. A 14
karat gold ring
21. On a
container of chicken broth you notice the instructions to “shake well before serving.” Which of the following best describes the chicken broth?
A. A
solution
B. An
element
C. A
compound
D. A
suspension
E. A pure
substance
22. The
formation of an ionic bond involves:
A. A
transfer of electrons
B. A
transfer of protons
C. A
transfer of neutrons
D. A sharing
of electrons
E. A sharing
of protons
23. Which of
the following is the chemical formula for the ionic compound magnesium nitride?
A. MgN
B. Mg2N
C. Mg2N3
D. Mg3N2
E. MgN2
24. Which of
the following is correct about a molecule of carbon trichloride?
A. It has
one carbon atom for each chloride atom.
B. It has
three chloride atoms for each carbon atom.
C. It has
three carbon atoms for each chloride atom.
D. It is a
mixture of equal parts carbon and trichloride.
E. It is a
solution of carbon in chlorine.
25. What is
the term for the substances that undergo a change in a chemical reaction?
A. Solutions
B. Products
C. Solvents
D. Catalysts
E. Reactants
26. When
methane (CH4) burns it combines with oxygen and forms carbon dioxide and water. Which of the following is the balanced chemical reaction for the burning of methane?