E) a mixture of solid and liquid

Transcription

1 ExamlA Fall20l6a Seat # Name M KE\ T w MULTIPLE CHOICE. Choos th one alternative that best completes the statement or answers the qubtion. (3 pts ea) 1) Which of the following is a chemical property? A) temperature B) mass c)@ D) melting point E) volume 2) All of the following are examples of matter except A) air. B) water. C) plants. D) salt. E@ 3) Which of the following is a physical change? A) the baking of a potato B) the rusting of iron D) the explosion of nitroglycerin 4) Which best describes the size and shape of a sample of gas? A) It has definite volume and definite shape. container, but it has a definite shape. B)l D) It has definite volume, but shape is determined by the E) Volume and shape cannot be described. container. 5) 1-butanethiol, one of the compounds giving skunks their distinctive odor, freezes at -'1.1.53"C and boils at 98.5'C. What is its phase at37"c? A) a mixture of liquid and gas B) gas C) solid "@ E) a mixture of solid and liquid 6) Which of the following is a pure substance? A) root beer B) eggs C@ D) hand lotion E) gasoline 7) Which of the following observations demonstrates that a solid sample is a compound? A) It cannot be broken down into simpler substances by chemical methods. B) Heating the substance causes no visible color change. C)H it to mel D lt cannot be broken down into simpler substances E) Crushing e samp does not affect its other properties. 8) The formula for glucose, C5H12O6, represents a compound composed of A) srxgloms of ca&qn and two atoms of water. B six atoms of carbory twelve atoms six atoms of oxygen. C) one atom of carbory two atoms of hydrogen, and one atom ot oxygen. D) six atoms of carbon, ten atoms of hydrogen, and four atoms of oxygen. E) six atoms of carbon and six atoms of water. A-1

2 9) ElementZhas the following properties: a. noncombustible b. unreactive c. colorless, odorless gas at room temperature d. nonconductor of electricity ElementZcanbeclassifiedasa-andwi11befoundthezigzagIineoftheperiodictab1e. A) metalloid; along side of B C) non-metal; along side of D) metal; to the right of E) metal; to the left of 10) Which chemical symbol represents a metallic element? A)Ar B)P C)Br D)H E@ 11) Consider the chemical reaction described as mercury(il) oxide g mercury + oxygen. Identify the reactant(s) in this example. A)@ B) mercury C) oxygen D) mercury + oxygen E) heat 12) The abbreviation for the metric unit used A)s B)K to measure volume is C) g/cm3 DC E)m 13) The measurement most likely to describe the A) 325 mg/ml. B) 1.s kg. 14) Which of the following measurements has A) a.250 g B) 1,,207 g amount of pain reliever in a headache tablet is c@ D)l.oomr-..@" three significant figures? E) 0.25 L. D) g E) g 15) What is the numerical value of '1.2 \ 1.222? Express your answer using the correct number of significant figures. A) 1,.47 B) 1,.4664 c(dk- asf D) E) none of the above,\ "itf 16) How many significant figures should be retained in the result of the following calculation?,y"*l&c'^'(= g.lse ( ) i. o. o+ I ll -, ( ;) lit?e- e&ci/hol- 1643'rna{' Ao B)3-2 \rr* =) O.O?l c)1 D)4 A-2

3 17) Find the difference (subtracted value) between two masses measured as 1,23.6 grams and Express the answer to the correct number of significant figures. A) grams B) 7.63 grams C) 8 grams D) 8.0 grams 18) Which choice best describes the degree of uncertainty in the measurement 1,6.30 g? A) The uncertainty cannot be determined without additional information. B) The quantity is exact. C) The uncertainty is in the ones place. D) Jhe uncertainty iq rnl-he tenths place. tl3.b 5 - r,5.9.?z 1 LLs.szzsrams.!':lgt =77.b r@ ct e 19) The number 5.320,1.02 in conventional notation is: A) B) C) ) In scientific notatiory the number 185,000,000 is A) 1.85x10-8,@ C) 185x10-8 D) D) 1.85x106 E)@ E) 185x106 2L) The smallest amount of an element that retains that element's characteristics is the A@ B) neutron. C) molecule. D) electron. E) proton. 22) Which characteristics correctly describe a neutron? A) approximate mass 5, L0-4 amu; charge -L; outside nucleus imate mass 1 amu; charge +1; inside nucleus D) approximate mass 5, 10-4 amu; charge +1; inside nucleus E) approximate mass L amu; charge 0; outside nucleus 23)Inaneutra1atomthenumberof-isequa1tothenumberof A B) neutrons, electrons C) protons, neutrons D) protons + electrons, neutrons E) none of the above 24\ The symbol of the element with 23 protons is A) B. B) Mg. C) Na. D@ E) Cr 25) An atom with 2:26 and,a = 58 contains LG protons ^ O-SLZ neutrons. -=- 1L A\ 32;26 B) 26;8a C) 58;26 D) 26;58 26) Adding one proton to the nucleus of an atom A) increases its atomic mass by one unit, but does not change its atomic number. B) does not change either its atomic number or its atomic mass. rts it to an i of the same element. E) increases its atomic number by one unit but does not change its atomic mass. A-3

4 E 27) Howmany neutrons does an atom of!6^rihave? -22 A) 22 B) 68 c) 46 E)0 28) Which elements all belong in the same group? Gfo ure ll A) Fe, Cu, Ni B) B, si, As D) c, N, o E) Al, Ge, Sb 29) Which element is most likely to have chemical properties similar to those of potassium (atomic number 1,9)? A) Sr (atomic number 38) B) Sc (atomic number 2L) C) Ca (atomicnumbervt0 D E) Ar (atomic number L8) 30) Which of the following is an alkali metal? A) Cl B) Al C) He 3L) The maximum number of electrons in any orbital is _. D)o E@ A)1 Be c)3 D)4 32) How many electrons can occupy the shell havi rrgn = 2? S C, + P C6) a t E)5 AO B)sz c)6 D)2 33) How many electrons can occupy the 4p subshell? on y P S.r,h Shet( ha s A)8 B) 10 c)1 xffi 34) What is the electron co4figuration of S? B) 1s2 2s2 Zp5 3s2 3p6 C) 1s2 2s2 2p6 esz 3f 4s2 3d1 D) 1s2 2s2 2p6 3s2 3p2 E) 1s2 Zs2 2f E) 18 orl,las 'c2e /orlrl{.'{zb D)2 Ec - 35) The noble gas shortcut electron configuration for nickel is A)[Ne]ss2sa8. u@ 35) Which group contains only d-block elements? A)Kr,Xe,Rn,@ C) tarl Esz +a8 C) Po, Fr, Ac D) tnel +s2 sa9 D) Ce, Pr, Nd 37) How many electrons are there in the valence shell of a nitrogen atom? A)0 B)7 co D)2 E)3 A-4

5 38) A positively charged particle formed by loss of one or more electrons from an atom is called a(an) A) proton. B@ C) nucleus. D) anion. E) isotope. 39) Main group elements that are non-metals usually one or more electrons to form which have a _charge. A) lose; cations; positive B) lose; cations; negative c)@ D) gain; cations; positive E) lose; anions; negative 40) The property defined as the energy required to remove one electron from an atom in the gaseous state is A) electronegativity. B) atomic number. C) electron affinity. D E) none of the above 41) Which of the following ions does not have the same electron configuration as the noble gas neon? A) F- B) O-2 C) at+3,@ E) trlg+2 42) Whatis the most likely charge on an ion formed by an element with a valence electron configuration of n9npa where n is an integer from 2to 6? A@ B) 4+ c) 1- D) 2+ E) 6+ 43) A11 of the following are properties typical of ionic compounds except A) have very high melting points and boiling points. B) exist as crystalline solids at room temperature. crtoilors - D) shatter when crystals are struck. E) conduct electrical current if dissolved in water. 44) What fourth period element is represented by the dot structure shown? X: A)K B)As c)v "@ 45) Which of the following elements is most likely to form an ion with a -2 charge? AO B)ri c)si D)K E) Ti E) Mg 46) What is the formula for the ionic compound formed between lithium and bromide? A) LiB B) Li2Br CfiB) D) Li+Br- E) LiBr2 A-5

6 47) Whatis the formula of a compound formed by the ions lr42+ and X3-? A) MK3 B) M2x C) MzXs Dv@ E) none of the above 48) Which of the following formulas represents a compound that is an acid? A) NH4CI " u@ c) H2o D) Caso4 E) Ms(oH)2 49) The formqla POa 3- means that this ion is composed of A four atoms of and three extra electrons. B) one atom of phosphorus,four atoms of oxygery and three electrons have been lost. C) four atoms of phosphorus, four atoms or oxygen, and three extra electrons. D) one atom of phosphorus, one atom of oxygery and three extra electrons. E) four atoms of phosphorus, four atoms of oxygen, and three electrons have been lost. 50) Choose the homogeneous mixture from the list below. A) mud B) salsa C) ice water D) salad dressing E) orange soda,"{"{b SHORT ANSWER Show all work for the following probleme, including dimeneional analysis. Box your final answer. Sig Figs count! _* 51) How many mg does a 433 kg sample contain? q3"q r tooog x lloo-5, {31oooooo m1,>w Kor dd a Lt?b\t z.zoulb* l-,v.l * rooom'i =qqiqtt7,i,o4"@. -*J"5?o consists.l * isotopes; arh having a mass of amu and zlxlhaving a mass of amu. A sample of Xq was found to contain 60.-1,1"/o of the 69xqisotope and 39.89% of the ZlXq'. Calculate the average atomic weight of a sample of Xq. ( o.(ao[l x b8.qegq,rr.q) + (o.3q&g {?o. gasar}1q) _ = Lt[.t{?lY arr\u + a8.aga-o qr'^v A-6

7 53) 95.0"F is the same as what lemperature in Kelvin? (gs. oot'tff*t, z (r.2il't, = as,o'c 3e Ooc + a,?3.15 = 7o9',.7 r --Sa OT,LK 54) How many dg are contained in 1.20 pounds? 1 kg= 2.2OSlb t,2o tb x t k?r * loooe& x to +?r = 5 f 3sF?.Los tb o(- '+ 5'l % ttb tkq d t3 r+ rtad T esb e SYL(.td% =).n 55) Determine the volume (in ml) of an object that has a mass of 455.6g and a density of 19.3 g/^l. L15S.b?* rnl z2a,-b0b =7@ te-33 t,yv r to3,ltfx r e3 56) What is the specific heat of a metal if it takes 26.5 calories to raise the temperature of a piece weighing 50.0 g from 22.0 degrees Celsius to27.}degreed Celsiusf A 7' = a?,o -!?.D = g,g oc S.H.' heo"* = ry1. A T ab.s cal G-o.oC C;,o'C) o, ld t" =) o.ll eal/a'c 57) How many B atoms of mass 11.0 amu are presentin27.0 g of B if 1 amu :'t.66057*1,0-24g )+. o3* Iamv l.bboyx, o-'! x tbc*tna,t o.r...u \ a-y.- LLl7 g y /D-' =) l.y 8 x lolyafums 58) Extra Credit: Write the Long and shortcut electron configuration for Pb. Shortcut fr Or) Longleotry, lt"f stapt 3.?a BP! L{ sasd'" qt6 55e.'l 'o stb 6 Sz rt$ r.t sj,o (o p. A-7

8 Nomenclature Portion Please write formulas for the following compounds (2 pts ea): L. cadmium chloride 2. scandium nitrate 3. sodium permanganate 4. plumbic bromide 5. manganese(il) nitride 6. zinc bromate 7. sulfuric acid 8. tin(il) carbonate 9. hydroiodic acid 10. sulfur hexafluoride 1L. fluorine gas CdC\A 6e (t toa)a Na f\n0q PbBrq flnzn e Zn Cr3r0g)^ Hr SO* SnCOs H f ro?r SFr" c ra Please give names for the following compounds. Use the STOCK system where appropriate. L. BaF2 2. Fe(oH)3 3. HCIO4 4. PzOs 5. CaSOa 6. HCl1aq; 7. Pb(BrO)a 8. KNO2 9. (NHa)2CrOa 10. scl4 ll. Cu.l2 bari urn Pluo rrde. rron (g) h.sdrox,de peroh\oric- oeia e-a\eiucn 6u\fa.le h*droohloric ac,id teoa (:g\ n')po\ccor-i +e pelosti.^rn ni \rl\<- rn rn oni urn -e chrocnak su\ eur te$rachtor' de e.pper(r) 'o&de