MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

Transcription

1 Practice Test Chs. 1 & 2: Chemical Foundations and Atoms, Formulas & Ions Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) What is the length of the side of a cube (in cm) that has a volume of 44.4 L? A) 875 B) 66.6 C) D) 35.4 E) ) 1 milligram = micrograms A) 0.01 B) 0.1 C) 10 D) E) 1,000 3) Precision refers to. A) how close a measured number is to the true value B) how close a measured number is to infinity C) how close a measured number is to zero D) how close a measured number is to the calculated value E) how close a measured number is to other measured numbers 4) What is the correct answer (reported to the proper number of significant figures) to the following? ( ) x (5.11 x 7.72) = A) B) C) 552 D) 5.5 x 102 E) 6 x 102 5) Which of the following has the same number of significant figures as the number ? A) B) 1 x 106 C) D) 8.66 E) 100 6) Round the following number to four significant figures and express the result in standard exponential notation: A) B) C) D) E) ) g/cm3 = kg/m3 A) B) C) x 10-5 D) x 10-9 E) ) A certain liquid has a density of 2.67 g/cm3. What volume (in L) would 1340 g of this liquid occupy? A) 1.99 x 10-3 B) C) 35.8 D) 50.2 E) ) A combination of sand, salt, and water is an example of a. A) heterogeneous mixture B) solid C) pure substance D) compound E) homogeneous mixture 1

2 10) If matter is uniform throughout, cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is. A) a compound B) a heterogeneous mixture C) a mixture of elements D) an element E) a homogeneous mixture 11) The charge on an electron was determined in the. A) Rutherford gold foil experiment B) Dalton atomic theory C) cathode ray tube, by J. J. Thompson D) atomic theory of matter E) Millikan oil drop experiment 12) Cathode rays are. A) neutrons B) atoms C) electrons D) protons E) x-rays 13) In the symbol below, x is. 13 x C A) the mass number B) the isotope number C) the number of neutrons D) the atomic number E) the elemental symbol 14) The mass number of an atom of 118Xe is. A) 110 B) 64 C) 118 D) 172 E) 54 15) Which isotope has 36 electrons in an atom? A) Kr B) Cl C) Br D) Se E) Hg 16) Which pair of atoms constitutes a pair of isotopes of the same element? A) 14 6 X X B) 6 6 X X C) 7 9 X X D) 8 10 X X E) 9 10 X X 17) The elements in groups 1A, 6A, and 7A are called,, respectively. A) alkaline earth metals, halogens, and chalcogens B) alkaline earth metals, transition metals, and halogens C) alkali metals, halogens, and noble gases D) alkali metals, chalcogens, and halogens E) halogens, transition metals, and alkali metals 2

3 18) In the periodic table, the rows are called and the columns are called. A) periods, groups B) rows, groups C) staffs, families D) cogeners, families E) octaves, groups 19) The correct name for CCl4 is. A) carbon tetrachlorate B) carbon chloride C) carbon perchlorate D) carbon tetrachloride E) carbon chlorate 20) The correct name for H2CO3 is. A) hydrocarbonate B) carbonous acid C) carbohydric acid D) carbohydrate E) carbonic acid 21) The correct formula for molybdenum(iv) hypochlorite is. A) Mo(ClO3)4 B) Mo(ClO2)4 C) Mo(ClO)4 D) MoCl4 E) Mo(ClO4)4 22) Chromium and chlorine form an ionic compound whose formula is CrCl3. The name of this compound is. A) chromium chlorine B) chromium(iii) trichloride C) chromium(iii) chloride D) chromic trichloride E) monochromium trichloride 3

4 Answer Key Testname: CH_01_02_PRAC_TEST.TST MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) D ID: chem9b ) E ID: chem9b ) E ID: chem9b ) D ID: chem9b ) C ID: chem9b ) B ID: chem9b ) E ID: chem9b ) B ID: chem9b ) A ID: chem9b ) A ID: chem9b ) E ID: chem9b ) C ID: chem9b ) D ID: chem9b ) C ID: chem9b ) A ID: chem9b ) A ID: chem9b ) D ID: chem9b ) A ID: chem9b ) D ID: chem9b ) E ID: chem9b ) C ID: chem9b

5 Answer Key Testname: CH_01_02_PRAC_TEST.TST 22) C ID: chem9b

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