Final Exam Review Project 5
Determine the best answers for the questions below. Always round appropriately.
1. Which of the following correctly represents the nuclide having 13 protons, 13 electrons, and 14
neutrons?
a. 27
13 Al b. 14
13 Al c. 13
27 Co d. 27
14 Si e. none of these 2. A sample of 18-karat gold is composed of the following by mass: 18.0 g gold, 3.0 g silver, and 3.0 g
copper. What is the percent gold? a. 6.0% b. 18% c. 25% d. 33% e. 75% 3. How many valence electrons are present in a Group IIA/2 element?
a. 2 b. 3 c. 4 d. 5 e. none of these 4. What is the coefficient of hydrogen gas after balancing the following equation? N2 (g) +
a. 1 H2 (g) ----->
b. 2 NH3 (g)
c. 3 d. 4 e. 5 5. What compound is formed between the chromium (III) and oxide ions?
a. Cr3O2 b. Cr6O6 c. Cr1O d. CrO e. none of these
Page 1 of 4 Final Exam Review
6. What subatomic particle has a mass of ~1 atomic mass unit and a positive charge?
a. alpha particle b. beta particle c. nucleus d. proton e. electron 7. What is the systematic name for N2O5?
a.
b.
c.
d.
e. dinitrogen oxide
nitrogen oxide
nitrogen pentaoxide
dinitrogen pentaoxide
none of these 8. How would the number 0.002570 be expressed in scientific notation?
a. 2.570 x 103 b. 2.570 x 10-3 c. 25.7 x 10-2 d. 25.7 x 102 e. none of these 9. What is the predicted ionic charge for a sodium ion?
a. 2+ b. 1+ c. 1- d. 2- e. 3- 10. How many total atoms are in a molecule of ammonium phosphate, (NH4)3PO4? a. 13 b. 18 c. 19 d. 20 e. none of these 11. What is the ionic charge for the tin ion in SnS2? a. 1+ b. 2+ c. 3+ d. 4+ e. none of these 12. If an automobile engine is 155 in3, what is the volume in cubic centimeters? (Given 1 inch = 2.54 cm exactly) a. 394 cm3 b. 1000 cm3 c. 2540 cm3 d. 61.0 cm3 e. 9.45 cm3
Page 2 of 4 Final Exam Review
13. What is the chemical formula for chromic acid?
a.
b.
c.
d.
e. H2CrO4 (aq)
H2Cr (aq)
HCrO4 (aq)
H3CrO4 (aq)
none of these 14. What type of chemical reaction is illustrated in Question 4?
a.
b.
c.
d.
e. combination
decomposition
single-replacement
double-replacement
neutralization 15. How many significant digits are in the mass measurement 1.2550 x 102 grams?
a. 1 b. 2 c. 3 d. 4 e. none of these 16. Calculate the mass of hydrogen from the reaction of 2.70 g of aluminum metal as shown in the
reaction below. Al(s) + a. 0.202 g HCl(aq) b. 0.606 g ® AlCl3(aq) c. 0.135 g + H2(g) d. 0.303 g e. 0.101 g Page 3 of 4 Final Exam Review
17. What types of measurements would be expressed with the following units, respectively?
milliliters, decigrams, pounds per gallon, Kelvin
a.
b.
c.
d.
e. volume, pressure, density, temperature
volume, mass, pressure, temperature
volume, mass, density, temperature
volume, mass, density, pressure
none of these 18. Which of the following metals will react with sulfuric acid?
(Hint: Write out the reactions…it will help you answer this question) a. Ag b. Cu c. Fe d. all of them e. none of them 19. Predict the product of the following reaction… Mg (s) + a. MgO O2 (g) -----> b. Mg2O c. MgO2 d. Mg2O3 e. Mg3O2 20. What are the products of the following reaction? Fe(NO3)3 (aq) a.
b.
c.
d.
e. + Na3PO4 (aq) -----> FeP and NaNO3
FePO3 and NaNO3
FePO4 and NaNO3
FePO4 and NaNO2
no reaction will occur
Page 4 of 4

 

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