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Chemistry |! 151-Final |! Exam |! with |!
complete |! solutions
determine |! the |! oxidation |! state |! of |! nitrogen |! in |! NaNO2 |! - |! Correct |! answer |! ✔+ a |! 12.39g |! sample |! of |! phosphorus |! reacts |! with |! 42.54g |! of |! chlorine |! to |! form |! only |! phosphorus |! trichloride. |! If |! it |! is |! the |! only |! product, |! what |! mass |! of |! PCl3 |! is |! formed? |!
- |! Correct |! answer |! ✔54.93g True |! or |! False: |! at |! very |! high |! pressures, |! a |! gas |! will |! occupy |! a |! larger |! volume |! than |! predicted |! by |! the |! ideal |! gas |! law |! - |! Correct |! answer |! ✔True determine |! the |! molarity |! of |! a |! solution |! formed |! by |! dissolving |! 97.7g |! LiBr |! in |! enough |! water |! to |! yield |! 750.0 |! mL |! - |! Correct |! answer |! ✔1.50M what |! element |! is |! undergoing |! oxidation |! in |! the |! following |! reaction: |! Zn |! + |! 2AgNO3-
|! Zn(NO3)2 |! + |! 2Ag |! - |! Correct |! answer |! ✔Zn determine |! the |! oxidation |! state |! of |! Carbon |! in |! CO2 |! - |! Correct |! answer |! ✔+
what |! is |! the |! concentration |! of |! CH3OH |! in |! a |! solution |! prepared |! by |! dissolving |! 12.5g |! of |! CH3OH |! insufficient |! water |! to |! give |! exactly |! 230mL |! of |! solution? |! - |! Correct |! answer |! ✔1.70M The |! capacity |! to |! do |! work |! is |! ___ |! - |! Correct |! answer |! ✔energy Identify |! ammonia |! - |! Correct |! answer |! ✔weak |! electrolyte, |! weak |! base identify |! the |! gas |! particle |! that |! travels |! the |! fastes? |! - |! Correct |! answer |! ✔H force |! exerted |! per |! unit |! area |! by |! gas |! particles |! as |! the |! strike |! the |! surfaces |! around |! them |! is___ |! - |! Correct |! answer |! ✔pressure determine |! the |! density |! of |! NH3 |! gas |! at |! 435K |! and |! 1.00 |! atm |! - |! Correct |! answer |! ✔0.477g/L determine |! the |! density |! of |! N2 |! gas |! at |! STp |! - |! Correct |! answer |! ✔1.25g/L Give |! the |! spectator |! ions |! for |! the |! reaction |! that |! occurs |! when |! aqueous |! solutions |! H2SO4 |! and |! KOH |! are |! mixed |! - |! Correct |! answer |! ✔K+ |! and |! SO2- partial |! pressure |! of |! water |! in |! a |! gaseous |! mixture |! - |! Correct |! answer |! ✔vapor |! pressure
Two |! samples |! of |! calcium |! fluoride |! are |! decomposed |! into |! their |! constituent |! elements. |! The |! first |! sample |! produced |! 0.154 |! g |! of |! calcium |! and |! 0.146 |! g |! of |! fluorine. |! If |! the |! second |! sample |! produced |! 294 |! mg |! of |! fluorine, |! how |! many |! g |! of |! calcium |! were |! formed? |! - |! Correct |! answer |! ✔0.309g using |! the |! following |! thermochemical |! equation, |! determine |! the |! amount |! of |! heat |! produced |! per |! kg |! of |! CO2 |! formed |! during |! the |! combustion |! of |! benzene |! - |! Correct |! answer |! ✔1.19x10^ determine |! the |! molarity |! of |! a |! solution |! formed |! by |! dissolving |! 3 |! moles |! of |! NaCl |! in |! enough |! water |! to |! yield |! 4L |! of |! solution |! - |! Correct |! answer |! ✔0.750M Gas |! molecules |! spread |! out |! in |! a |! concentration |! gradient |! is |! ___ |! - |! Correct |! answer |! ✔diffusion a |! student |! prepared |! a |! stock |! solution |! by |! dissolving |! 10g |! KOH |! in |! enough |! water |! to |! make |! 150mL |! of |! solution. |! She |! then |! took |! 15.0mL |! of |! the |! stock |! solution |! and |! diluted |! it |! with |! enough |! water |! to |! make |! 65mL |! of |! a |! final |! solution. |! What |! is |! the |! concentration |! of |! KOH |! for |! the |! final |! solution? |! - |! Correct |! answer |! ✔0.274M given |! w=0, |! an |! endothermi |! reaction |! has |! the |! following |! - |! Correct |! answer |! ✔+H; |! +E If |! a |! mixture |! of |! 8mol |! He |! and |! 8 |! mol |! Xe |! are |! at |! STP |! in |! a |! rigid |! container,what |! must |! be |! true? |! - |! Correct |! answer |! ✔both |! gases |! have |! the |! same |! average |! kinetic |! energy
the |! result |! of |! force |! acting |! through |! a |! distance |! is |! ___ |! - |! Correct |! answer |! ✔work To |! what |! temperature |! must |! a |! balloon, |! initally |! at |! 25C |! and |! 2L, |! be |! heated |! in |! order |! to |! have |! a |! volume |! of |! 6L? |! - |! Correct |! answer |! ✔894K which |! of |! the |! following |! solutions |! will |! have |! the |! highest |! electrical |! conductivity? |! - |! Correct |! answer |! ✔0.15M |! LiF in |! a |! container |! containing |! CO, |! H2 |! and |! CO2, |! what |! is |! the |! mole |! fraction |! of |! CO |! if |! the |! H2 |! mole |! fraction |! is |! 0.22 |! and |! the |! CO2 |! mole |! fraction |! is |! 0.58? |! - |! Correct |! answer |! ✔0. Ba |! + |! 2HCl-> |! BaCl2 |! + |! H2 |! is |! an |! example |! of |! what |! kind |! of |! reaction? |! - |! Correct |! answer |! ✔oxidation-reduction |! reaction what |! are |! the |! coefficients |! in |! front |! of |! NO3- |! and |! Cu |! when |! the |! following |! redox |! equation |! is |! balanced |! in |! an |! acidic |! solution? |! - |! Correct |! answer |! ✔2, which |! of |! the |! compounds |! of |! H2C2O4, |! Ca(OH)2, |! NaOH |! and |! HI |! behave |! as |! acids |! when |! they |! are |! dissolved |! in |! water? |! - |! Correct |! answer |! ✔H2C2O4 |! and |! HI what |! is |! true |! about |! kinetic |! molecular |! theory? |! - |! Correct |! answer |! ✔the |! collisions |! of |! particles |! with |! one |! another |! is |! completely |! elastic
true |! or |! false: |! halogens |! tend |! to |! form |! +1 |! ions |! - |! Correct |! answer |! ✔false the |! molecular |! weight |! of |! urea, |! a |! compound |! used |! as |! a |! nitrogen |! fertilizer, |! is |! _____ |! amu? |! - |! Correct |! answer |! ✔60. determine |! the |! volume |! of |! an |! object |! that |! has |! a |! mass |! of |! 455.6g |! and |! a |! density |! of |! 19.3g/cm3 |! - |! Correct |! answer |! ✔23.6mL two |! different |! compounds |! formed |! from |! carbon |! and |! oxygen |! have |! the |! following |! mass |! ratios: |! 1.33g |! O: |! 1g |! C |! and |! 2.66g |! O: |! 1g |! C |! is |! an |! example |! of |! which |! law? |! - |! Correct |! answer |! ✔law |! of |! multiple |! proportions An |! acetylene |! molecule |! contains |! 2 |! atoms |! of |! carbon. |! The |! number |! 2 |! represents |! how |! many |! significant |! figures? |! - |! Correct |! answer |! ✔infinite Determine |! the |! molecular |! formula |! of |! a |! compound |! that |! has |! a |! molar |! mass |! of |! 183.2 |! g/mol |! and |! an |! empirical |! formula |! of |! C2H5O2. |! - |! Correct |! answer |! ✔C6H15O Give |! the |! correct |! formula |! for |! aluminum |! sulfate. |! - |! Correct |! answer |! ✔Al2(SO4) what |! is |! the |! empirical |! formula |! for |! C12H24O6? |! - |! Correct |! answer |! ✔C2H4O What |! is |! the |! mass |! of |! 0.500 |! mol |! of |! dichlorodifluoromethane, |! CF2Cl2? |! - |! Correct |! answer |! ✔60.5g
give |! the |! name |! for |! KHSO3 |! - |! Correct |! answer |! ✔potassium |! hydrogen |! sulfite What |! answer |! should |! be |! reported, |! with |! the |! correct |! number |! of |! significant |! figures, |! for |! the |! following |! calculation? |! (249.362 |! + |! 41) |! /63.498 |! - |! Correct |! answer |! ✔4. what |! is |! true |! about |! isotopes? |! - |! Correct |! answer |! ✔some |! elements |! have |! 3 |! or |! more |! naturally |! occurring |! isotopes how |! many |! phosphorus |! atoms |! are |! contained |! in |! 158kg |! of |! phosphorus? |! - |! Correct |! answer |! ✔3.07x10^ identify |! the |! longest |! length |! - |! Correct |! answer |! ✔1.00m calculate |! the |! atomic |! mass |! of |! silver |! if |! silver |! has |! 2 |! naturally |! occurring |! isotopes |! with |! the |! following |! masses |! and |! natural |! abundances: |! Ag-107, |! 106.90509amu, |! 51.84% Ag-109, |! 108.90476amu, |! 48.46% |! - |! Correct |! answer |! ✔108.19amu Write |! the |! name |! for |! Sn(SO4)2. |! Remember |! that |! Sn |! forms |! several |! ions. |! - |! Correct |! answer |! ✔tin |! (IV) |! sulfate a |! student |! performs |! an |! experiment |! to |! determine |! the |! density |! of |! a |! sugar |! solution. |! she |! obtains |! the |! following |! results: |! 1.70g/mL, |! 1.73g/mL, |! 1.66g/mL, |! and
what |! is |! the |! charge |! on |! the |! Co |! ion |! in |! Co2O3? |! - |! Correct |! answer |! ✔3+ which |! of |! the |! following |! is |! equal |! to |! exactly |! 1 |! mole |! of |! atoms? |! - |! Correct |! answer |! ✔12.00g |! of |! carbon- which |! of |! the |! following |! are |! examples |! of |! extensive |! properties? |! - |! Correct |! answer |! ✔mass what |! species |! is |! represented |! by |! the |! following |! information? |! p=12; |! n=14; |! e=10 |! - |! Correct |! answer |! ✔Mg2+ a |! covalent |! bond |! is |! best |! described |! as |! _____ |! - |! Correct |! answer |! ✔sharing |! of |! electrons |! between |! atoms identify |! the |! largest |! by |! size |! atom |! or |! ion |! of |! carbon |! - |! Correct |! answer |! ✔p=6; |! n=6; |! e= give |! the |! name |! for |! KMnO4 |! - |! Correct |! answer |! ✔potassium |! permanganate which |! of |! the |! following |! contains |! the |! MOST |! atoms? |! - |! Correct |! answer |! ✔10g |! Ne a |! sample |! of |! pure |! lithium |! nitrate |! contains |! 7.99% |! lithium |! by |! mass? |! what |! is |! the |! % |! lithium |! by |! mass |! in |! a |! sample |! of |! pure |! lithium |! nitrate |! that |! has |! twice |! the |! mass |! of |! the |! first |! sample? |! - |! Correct |! answer |! ✔7.99%
calculate |! the |! molar |! mass |! of |! Al(C2H3O2)3 |! - |! Correct |! answer |! ✔204.13g/mol how |! many |! moles |! of |! Kr |! are |! contained |! in |! 398mg |! of |! Kr? |! - |! Correct |! answer |! ✔4.75x10^- how |! many |! significant |! figures |! are |! in |! 0.00226500 |! mL? |! - |! Correct |! answer |! ✔ 6 determine |! the |! name |! for |! N2O5 |! - |! Correct |! answer |! ✔dinitrogen |! pentoxide molecules |! can |! be |! described |! as |! ___ |! - |! Correct |! answer |! ✔two |! or |! more |! atoms |! chemically |! joined |! together a |! piece |! of |! metal |! ore |! weighs |! 9g. |! When |! a |! student |! places |! it |! into |! a |! graduated |! cylinder |! containing |! water, |! the |! liquid |! level |! rises |! from |! 21.25mL |! to |! 26.47mL. |! What |! is |! the |! density |! of |! the |! ore? |! - |! Correct |! answer |! ✔1.72g/mL which |! of |! the |! following |! elements |! has |! chemical |! properties |! similar |! to |! tellurium? |! - |! Correct |! answer |! ✔sulfur which |! of |! the |! following |! elements |! is |! a |! halogen? |! - |! Correct |! answer |! ✔Br what |! is |! true |! about |! a |! scientific |! law? |! - |! Correct |! answer |! ✔a |! scientific |! law |! summarizes |! a |! series |! of |! related |! observations
how |! many |! different |! values |! of |! l |! are |! possible |! in |! the |! third |! principal |! level? |! - |! Correct |! answer |! ✔ 3 identify |! the |! isoelectronic |! elements |! - |! Correct |! answer |! ✔P3-, |! S2-, |! Cl-, |! K+ what |! is |! true |! about |! electrons? |! - |! Correct |! answer |! ✔outer |! electrons |! efficiently |! shield |! one |! another |! from |! nuclear |! charge which |! of |! the |! following |! visible |! colors |! of |! light |! has |! the |! longest |! wavelength? |! - |! Correct |! answer |! ✔red what |! are |! the |! possible |! orbitals |! for |! n=3? |! - |! Correct |! answer |! ✔s,p,d place |! the |! following |! in |! order |! of |! increasing |! IE1: K |! Ca |! Rb |! - |! Correct |! answer |! ✔Rb<K<Ca give |! the |! ground |! state |! electron |! configuration |! for |! Se |! - |! Correct |! answer |! ✔[Ar]4s2,3d10,4p the |! reaction |! associated |! with |! the |! ionization |! energy |! of |! potassium |! is |! an |! example |! of |! what?? |! - |! Correct |! answer |! ✔endothermic |! reaction
calculate |! the |! wavelength |! of |! a |! baseball |! (m=155g) |! moving |! at |! 32.5m/s |! - |! Correct |! answer |! ✔1.32x10^- When |! a |! wave |! encounters |! an |! obstacle |! or |! a |! slit |! that |! is |! comparable |! in |! size |! to |! its |! wavelength, |! it |! bends |! around |! it. |! This |! characteristic |! is |! called |! - |! Correct |! answer |! ✔diffraction identify |! the |! strongest |! bond |! - |! Correct |! answer |! ✔triple |! covalent |! bond the |! vertical |! height |! of |! a |! wave |! is |! called |! ____ |! - |! Correct |! answer |! ✔amplitude identify |! the |! number |! of |! bonding |! pairs |! and |! lone |! pairs |! of |! electrons |! in |! water |! - |! Correct |! answer |! ✔ 2 |! bonding |! pairs |! and |! 2 |! lone |! pairs what |! is |! true |! about |! orbitals? |! - |! Correct |! answer |! ✔atoms |! are |! roughly |! spherical |! because |! when |! all |! of |! the |! different |! shaped |! orbitals |! are |! overlapped |! they |! take |! on |! a |! spherical |! shape choose |! the |! ground |! state |! electron |! configuration |! for |! Zn2+ |! - |! Correct |! answer |! ✔[Ar]3d calculate |! the |! energy |! of |! the |! orange |! light |! emitted, |! per |! photon, |! by |! a |! neon |! sign |! with |! a |! frequency |! of |! 4.89x10^14 |! Hz |! - |! Correct |! answer |! ✔3.24x10^-
Determine |! the |! energy |! change |! associated |! with |! the |! transition |! from |! n=2 |! to |! n=5 |! in |! the |! hydrogen |! atom. |! - |! Correct |! answer |! ✔+4.58x10^-19J How |! many |! of |! the |! following |! species |! are |! paramagnetic? |! Sc3+, |! Cl-, |! Ba2+, |! Se |! - |! Correct |! answer |! ✔ 1 which |! reaction |! below |! represents |! the |! electron |! affinity |! of |! Li? |! - |! Correct |! answer |! ✔Li(g) |! + |! e- |! ->Li-(g) how |! many |! valence |! electrons |! do |! the |! alkali |! metals |! possess? |! - |! Correct |! answer |! ✔ 1 construct |! a |! Born-Haber |! cycle |! to |! determine |! the |! electron |! affinity |! of |! Br. |! - |! Correct |! answer |! ✔-325kJ identify |! the |! bond |! with |! the |! highest |! bond |! energy |! - |! Correct |! answer |! ✔C=N which |! of |! the |! following |! represent |! the |! lewis |! structure |! for |! Ca2+ |! - |! Correct |! answer |! ✔Ca2+ a |! type |! of |! energy |! embodied |! in |! oscillating |! electric |! and |! magnetic |! fields |! - |! Correct |! answer |! ✔electromagnetic |! radiation which |! atom |! has |! the |! smallest |! atomic |! radius? |! - |! Correct |! answer |! ✔As
calculate |! the |! energy |! of |! the |! red |! light |! emitted |! by |! a |! neon |! atom |! with |! a |! wavelength |! of |! 703.2nm. |! - |! Correct |! answer |! ✔2.83x10^-19J
