Chemistry Study Guide

Topics: Atom, Covalent bond, Chemical bond Pages: 11 (1349 words) Published: March 29, 2014
1. Which of the following polyatomic ions have a 3-ionic charge? a. Phosphate
b. Hydrogen carbonate
c. Sulfate
d. Hydroxide
e. Nitrate

2. In which of the following is the metric unit paired with its correct abbreviation? a. Centimeter/km
b. Kilogram/cg
c. Millimeter/mL
d. Microgram/mg
e. Gram/gm

3. The number of electrons in an ion with 20 protons and an ionic charge of 2- is? a. 22
b. 18
c. 20
d. 16
e. 24

4. Which of the following is a measurement of mass in the metric system? a. Meter
b. Centimeter
c. Millimeter
d. Celsius
e. Kilogram

5. A dose of aspirin of 5.0 mg per kilogram of body weight has been prescribed to reduce the fever of an infant weighing 8.5 pounds. The number of milligrams of aspirin that should be administered is? a. 1.6mg

b. 53 mg
c. 5.0 mg
d. 19 mgCorrect answer. 1 lb = .453592 kg / 8.5*.453592 = 3.855532 kg e. .59 mg 3.855532 * 5 = 19.3 mg

6. Identify the formula of the ionic compound containing Mg2+ and S2- a. none of the above
b. Mg2S
c. Mg2S4
d. Mg2S2
e. MgS2

7. Identify the formula of the ionic compound containing Ag+ and SO32 a. Ag(SO3)2
b. Ag2(SO3)2
c. AgSO3
d. None of the above
e. Ag2SO3

8. What is the answer, with the correct number of decimal places, for this problem? 4.392g + 102.40g +2.51g =
a. 109.30 g
b. 110 g
c. 109 g
d. 109.3 g
e. 109.302 g

9. A calculator answer of 423.6059 must be rounded off to 3 significant figures. What answer is reported? a. 420
b. 424
c. 423.7
d. 423
e. 423.6

10. Double and triple bonds form because
a. The atoms involved have high electronegativities
b. Single covalent bonds do not give all the atoms in the molecule 8 valence electrons c. One of the atoms in the molecule has more than 8 valence electrons d. The ions involved have charges larger than 1

e. There is at least 1 hydrogen atom involved in the bond

11. Expressing the answer in scientific notation with proper significant figures, how many ounces are there in 9000 microliters? a. 3.000x10-4oz
b. 3.000x10-1oz
c. 2.999x10-4oz
d. 3x10-1oz
e. 3x10-4oz

12. Expressing the answer in scientific notation with proper significant figures, how many ounces are there in 0.0520 kilograms? a. 9.151x100oz
b. 1.83x100 oz
c. 1.83x101 oz
d. 9.151x101oz
e. 9.15x100oz

13. The main type of interaction between molecules of ammonia (NH3) are a. Ionic bonds
b. Dipole-dipole
c. Dispersion forces
d. Polar covalent
e. Hydrogen bonds

14. Valence electrons are electrons located
a. Throughout the atom
b. In the nucleus of the atom
c. In the outermost energy level of an atom
d. In the innermost energy level of an atom
e. In the first 3 shells of an atom

15. The element in this list with chemical properties similar to magnesium is a. Carbon
b. Sodium
c. Chlorine
d. Strontium
e. Boron

16. Select the correct symbol for the element named:
Mercury
a. Hg
b. Na
c. Mr
d. Au
e. Au

17. Are molecules of CS2 polar or nonpolar
a. Polar
b. Nonpolar
c. Negative only
d. None of the above
e. Positive only

18. Which of the following elements forms 2 or more ions with different ionic charges? a. Fe
b. K
c. O
d. Ca
e. F

19. When 2610 + 11.7 + 0.22 are added, the answer to the correct number of decimal places is a. 2621.9
b. 2620
c. 2600
d. 2621.92
e. 2621

20. What is the mass of 53mL of ethyl alcohol, which has a density of 0.79 g/mL? a. 41.9g (this is the right answer) mass=density * volume
b. 67.1g
c. 42 g (maybe he wants this one??)
d. 53g
e. 67g

21. What is the formula of carbon tetraiodide?
a. C2I4
b. C2I
c. CI4
d. CI3
e. CI

22. The atomic size of atoms
a. Decreases going down within a group
b. Increases going across a period
c. Increases going down within a group
d. None of these
e. Does not change going down within a group

23. Which is the most electronegative element between Bromine and Iodine? a. Bromine
b. Both are equal
c. Indeterminate
d. Iodine...
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