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Study Resources (Chemistry)

3.1   Multiple-Choice Questions 1) Chemical equations are balanced in order to obey the law of A) definite proportions. B) mass action. C) mass conservation. D) multiple proportions. 2) Which one of the following statements about balanced equations is false? In a balanced reaction A) atoms must be balanced on both sides of the reaction arrow. B) mass must.
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121) The chemical formula for the sulfite ion is A) S-. B) S2-. C) SO32-. D) SO42-. 122) The chemical formula for potassium peroxide is A) KOH. B) KO2. C) K2O. D) K2O2. 123) The compound, Cu(ClO3)2, is named A) copper chlorate(II). B) copper(I) chlorate. C) copper(I) chlorate(II). D) copper(II) chlorate. 124) By analogy with the oxoanions of sulfur, H2TeO3 would be named A) hydrotellurous acid. B).
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41) What is the chemical formula for  calcium hydroxide? A) CaH2 B) CaOH C) CaOH2 D) Ca(OH)2 42) What is the chemical formula for  magnesium hydride? A) MgH2 B) MgOH C) MgOH2 D) Mg(OH)2 43) An aqueous solution of H2S is named A) hydrosulfuric acid. B) hydrosulfurous acid. C) sulfuric acid. D) sulfurous acid. 44) The chemical formula for the  sulfite ion is A) S-. B).
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81) A radioisotope has a neutron/proton ratio which is too low. Which of the following processes will not occur for such a nucleus? A) alpha emission B) beta emission C) electron capture D) positron emission 82) A radioisotope which is neutron poor and very heavy is most likely to decay by A) alpha emission, electron capture,.
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11) Which of the following elements is a  gas at room temperature? A) bromine B) carbon C) helium D) sodium 12) Which of the following elements is not a solid at room temperature? A) Ag B) Al C) Xe D) Fe 13) Which of the following elements is classified as a semimetal? A) calcium B) boron C) fluorine D) uranium 14) Which of the.
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11) Chlorine has two common isotopes, chlorine-35 and chlorine-37, and an atomic mass of 35.45 amu. The natural abundance of chlorine-35 is ________ (greater than, less than, the same as) the natural abundance of chlorine-37. 12) The number of atoms in 23 g of Na is ________ (greater than, less.
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31) Which one of the following elements is a poor conductor of heat and electricity? A) copper B) fluorine C) iron D) lead 32) Gaseous elements characterized by low reactivity are found in group ________ of the periodic table. A) 5A B) 6A C) 7A D) 8A 33) All of the following elements are nonmetals except A) antimony. B) carbon. C) hydrogen. D) oxygen. 34).
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171) Which elements commonly form covalent bonds? A) A and B B) A and C C) B and D D) C and D In the following drawings, shaded spheres represent cations and unshaded spheres represent anions.     172) Which drawing represents the ionic compound Mg3(PO4)2? A) drawing (a) B) drawing (b) C) drawing (c) D) drawing (d) 173) Which drawing represents the.
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1.2   Algorithmic Questions 1) What is the chemical symbol for  titanium? A) Th B) Ti C) Tl D) Tm 2) What is the chemical symbol for  mercury? A) Ag B) Au C) Hg D) Pb 3) What is the chemical symbol for  copper? A) Co B) Cr C) Cu D) C 4) Which element has the chemical symbol,  Ru? A) rubidium B) ruthenium C) rutherfordium D) rhodium 5) Which element has.
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2.1   Multiple-Choice Questions 1) According to history, the concept that all matter is composed of atoms was first proposed by A) the Greek philosopher Democritus, but not widely accepted until modern times. B) Dalton, but not widely accepted until the work of Mendeleev. C) Dalton, but not widely accepted until the work of Einstein. D).
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151) Which of the following figures represents ? Unshaded spheres represent neutrons and shaded spheres represent protons. A) figure (1) B) figure (2) C) figure (3) D) figure (4) 152) Which of the following figures represents ? Unshaded spheres represent neutrons and shaded spheres represent protons. A) figure (1) B) figure (2) C) figure (3) D) figure (4) 153) Tell.
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141) Assume that the mixture of substances in drawing (1) undergoes a chemical reaction. Which of the drawings (2)-(4) represents a product mixture that is consistent with the law of mass conservation? A) drawing (2) B) drawing (3) C) drawing (4) 142) Assume that the mixture of substances in drawing (1) undergoes a chemical.
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61) What is the coldest temperature possible? A) 0°C B) 0°F C) 0 K D) None of these 62) If the melting point of titanium metal is 1672°C, what is its melting point in Kelvins? A) 897 K B) 1399 K C) 1945 K D) 3042 K 63) Which of the following is the lowest temperature? A) 37°C B) 54°F C) 313 K D).
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21) Gold is an example of A) a compound. B) an element. C) a heterogeneous mixture. D) a homogeneous mixture. 22) Ammonia is an example of A) a compound. B) an element. C) a heterogeneous mixture. D) a homogeneous mixture. 23) In which set do all elements tend to form cations in binary ionic compounds? A) K,  Ga,  O B) Sr,  Ni, .
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111) The solid compound, Na2CO3, contains A) Na+, C4+, and O2- ions. B) Na+ ions and CO32-ions. C) Na2+ and CO32- ions. D) Na2CO3 molecules. 112) Which of the following statements concerning ionic compounds is true? A) Essentially all ionic compounds are solids at room temperature and pressure. B) Ionic compounds do not contain any covalent bonds. C).
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121) What group of elements does the shaded area in the following periodic table indicate? A) alkali metals B) alkaline earth metals C) halogens D) noble gases 122) What group of elements does the shaded area in the following periodic table indicate? A) gases B) metals C) nonmetals D) semimetals 123) What group of elements does the shaded area in.
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131) What are the names of the ions Ba2+, Sn2+, and Se2-? A) barium, tin, and selenium B) barium, tin(II), and selenide C) barium(II), tin(II), and selenium(II-) D) barous, stannous, and selenide     132) Which of the above drawings represents a pure element? A) drawing (a) B) drawing (b) C) drawing (c) 133) Which of the above drawings represents a.
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1.3   Short Answer Questions 1) Chemistry is the study of the composition, properties, and transformations of ________. 2) A preliminary explanation of the results of many experiments that can be used to make predictions and suggest further experimentations is a ________. 3) The symbol for mercury is ________. 4) Pb is.
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41) The factor 10-2 corresponds to which prefix? A) deka B) deci C) centi D) milli 42) Convert 5.100 × 10-3 to ordinary notation. A) 0.0005100 B) 0.005100 C) 510.0 D) 5100 43) Convert 0.003002 to standard scientific notation. A) 3.002 × 10-3 B) 3002 × 10-6 C) 3.002 × 103 D) 3002 × 106 44) A sailor circumnavigated the earth and covered 4,264,000 meters..
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