Download Straighterline Chemistry Final Exam with precise answers and more Exams Chemistry in PDF only on Docsity!
Straighterline |! Chemistry |! Final |! Exam
|! with |! precise |! answers
What |! is |! the |! term |! used |! for |! findings |! that |! are |! summarized |! based |! on |! a |! pattern |! or |! trend? a. |! Law |! b. |! Hypothesis c. |! Theory d. |! Phenomena e. |! Prediction |! - |! Correct |! answer |! ✔a. |! Law Which |! of |! the |! following |! is |! a |! tentative |! explanation |! for |! a |! set |! of |! observations? Select |! one: a. |! Law b. |! Hypothesis |! c. |! Theory d. |! Phenomena e. |! Prediction |! - |! Correct |! answer |! ✔b. |! Hypothesis If |! a |! liquid |! contains |! 60% |! sugar |! and |! 40% |! water |! throughout |! its |! composition |! then |! what |! is |! it |! called? Select |! one:
a. |! Solute b. |! Compound c. |! Homogeneous |! mixture |! d. |! Heterogeneous |! mixture e. |! Solvent |! - |! Correct |! answer |! ✔c. |! Homogeneous |! mixture Which |! of |! the |! following |! does |! not |! have |! a |! uniform |! composition |! throughout? Select |! one: a. |! Element b. |! Compound c. |! Homogeneous |! mixture d. |! Heterogeneous |! mixture |! e. |! Solvent |! - |! Correct |! answer |! ✔d. |! Heterogeneous |! mixture Which |! one |! of |! these |! represents |! a |! physical |! change? Select |! one: a. |! Water, |! when |! heated, |! forms |! steam. |! b. |! Bleach |! turns |! hair |! yellow. c. |! Sugar, |! when |! heated, |! becomes |! brown. d. |! Milk |! turns |! sour. e. |! Apples, |! when |! exposed |! to |! air, |! turn |! brown. |! - |! Correct |! answer |! ✔a. |! Water, |! when |! heated, |! forms |! steam. How |! many |! micrograms |! are |! in |! 65.3 |! kg?
What |! terms |! defines |! a |! mass |! which |! is |! exactly |! equal |! to |! 1/12 |! the |! mass |! of |! one |! carbon-12 |! atom? Select |! one: a. |! Isotope |! number b. |! Mass |! number c. |! Mass-to-charge |! ratio d. |! Atomic |! number e. |! Atomic |! mass |! unit |! - |! Correct |! answer |! ✔e. |! Atomic |! mass |! unit How |! many |! neutrons |! are |! there |! in |! an |! atom |! of |! lead |! whose |! mass |! number |! is |! 208? Select |! one: a. |! 82 b. |! 126 |! c. |! 208 d. |! 290 e. |! none |! of |! them |! - |! Correct |! answer |! ✔b. |! 126 Which |! of |! these |! elements |! is |! chemically |! similar |! to |! magnesium? Select |! one:
a. |! Sulfur b. |! Calcium |! c. |! Iron d. |! Nickel e. |! Potassium |! - |! Correct |! answer |! ✔b. |! Calcium C(graphite) |! and |! C(diamond) |! are |! examples |! of: Select |! one: a. |! isotopes |! of |! carbon. b. |! allotropes |! of |! carbon. |! c. |! the |! law |! of |! definite |! proportions. d. |! different |! carbon |! ions. |! - |! Correct |! answer |! ✔b. |! allotropes |! of |! carbon. The |! 80Br- |! ion |! has Select |! one: a. |! 45 |! protons, |! 35 |! neutrons, |! 45 |! electrons. |! b. |! 35 |! protons, |! 45 |! neutrons, |! 34 |! electrons. c. |! 35 |! protons, |! 45 |! neutrons, |! 36 |! electrons. d. |! 45 |! protons, |! 35 |! neutrons, |! 46 |! electrons. e. |! 35 |! protons, |! 45 |! neutrons, |! 46 |! electrons. |! - |! Correct |! answer |! ✔e. |! 35 |! protons, |! 45 |! neutrons, |! 46 |! electrons.
Which |! of |! the |! following |! is |! a |! molecular |! formula |! for |! a |! compound |! with |! an |! empirical |! formula |! of |! CH? Select |! one: a. |! C2H b. |! C3H c. |! C4H d. |! C6H6 |! e. |! None |! of |! the |! answers |! is |! correct. |! - |! Correct |! answer |! ✔d. |! C6H Which |! is |! the |! correct |! electron |! configuration |! for |! gold? Select |! one: a. |! [Xe]4f145d96s b. |! [Xe]4f145d106s c. |! [Xe]4f135d106s d. |! [Xe]4f145d106s1 |! e. |! None |! of |! the |! electron |! configurations |! is |! correct. |! - |! Correct |! answer |! ✔d. |! [Xe]4f145d106s A(n) |! _________ |! is |! a |! point |! at |! which |! a |! standing |! wave |! has |! zero |! amplitude. Select |! one: a. |! crevice b. |! node |!
c. |! pit d. |! burrow e. |! orbital |! - |! Correct |! answer |! ✔b. |! node The |! Pauli |! exclusion |! principle |! states |! that |! no |! ____ |! electrons |! within |! an |! atom |! can |! have |! the |! same |! ____ |! quantum |! numbers. Select |! one: a. |! 4; |! 6 b. |! 2; |! 4 |! c. |! 3; |! 6 d. |! 6; |! 10 e. |! 3; |! 8 |! - |! Correct |! answer |! ✔b. |! 2; |! 4 Emission |! spectra Select |! one: a. |! cannot |! be |! used |! to |! identify |! an |! unknown |! atom. b. |! can |! be |! used |! to |! identify |! unknown |! atoms. |! c. |! can |! be |! explained |! by |! the |! movement |! of |! protons |! colliding |! with |! electrons. d. |! none |! of |! the. |! - |! Correct |! answer |! ✔b. |! can |! be |! used |! to |! identify |! unknown |! atoms. Which |! one |! of |! the |! following |! equations |! correctly |! represents |! the |! process |! relating |! to |! the |! ionization |! energy |! of |! X?
How |! does |! atomic |! radius |! change |! as |! you |! move |! across |! the |! periodic |! table? Select |! one: a. |! Atomic |! radius |! decreases |! moving |! from |! left |! to |! right |! across |! a |! period |! and |! increases |! from |! top |! to |! bottom. |! b. |! Atomic |! radius |! increases |! moving |! left |! to |! right |! across |! a |! period |! and |! decreases |! from |! top |! to |! bottom. c. |! Smaller |! nuclear |! charge |! lowers |! energy; |! more |! electrons |! in |! an |! orbital |! lowers |! energy. d. |! Atomic |! radius |! increases |! diagonally |! across |! the |! periodic |! table. e. |! None |! of |! the |! answers |! is |! correct. |! - |! Correct |! answer |! ✔a. |! Atomic |! radius |! decreases |! moving |! from |! left |! to |! right |! across |! a |! period |! and |! increases |! from |! top |! to |! bottom. Which |! of |! these |! choices |! is |! the |! electron |! configuration |! of |! the |! iron(III) |! ion? Select |! one: a. |! [Ar]3d5 |! b. |! [Ar]4s13d c. |! [Ar]4s23d d. |! [Ar]3d e. |! [Ar]4s23d9 |! - |! Correct |! answer |! ✔a. |! [Ar]3d An |! element |! with |! the |! general |! electron |! configuration |! for |! its |! outermost |! electrons |! of |! ns2np1 |! would |! be |! in |! which |! element |! group? Select |! one:
a. |! 2A b. |! 3A |! c. |! 4A d. |! 5A e. |! 8A |! - |! Correct |! answer |! ✔b. |! 3A The |! effective |! nuclear |! charge |! for |! an |! atom |! is |! less |! than |! the |! actual |! nuclear |! charge |! due |! to Select |! one: a. |! shielding. |! b. |! penetration. c. |! paramagnetism. d. |! electron-pair |! repulsion. e. |! relativity. |! - |! Correct |! answer |! ✔a. |! shielding. Which |! pair |! of |! ions |! exhibits |! the |! greatest |! attractive |! force |! between |! them? Select |! one: a. |! Na+ |! and |! Cl- b. |! Ca2+ |! and |! Cl- c. |! Na+ |! and |! S2- d. |! Al3+ |! and |! Mg2+ e. |! Mg2+ |! and |! O2- |! - |! Correct |! answer |! ✔e. |! Mg2+ |! and |! O2- Which |! of |! the |! following |! is |! a |! basic |! oxide?
e. |! -2. |! - |! Correct |! answer |! ✔a. |! 2. Which |! molecule |! has |! the |! largest |! dipole |! moment? Select |! one: a. |! HF b. |! HI c. |! HBr d. |! HCl e. |! All |! of |! the |! molecules |! have |! the |! same |! dipole |! moment. |! - |! Correct |! answer |! ✔a. |! HF In |! which |! of |! the |! following |! species |! does |! the |! central |! atom |! violate |! the |! octet |! rule? Select |! one: a. |! CH b. |! SF4 |! c. |! PCl4+ d. |! CCl3+ e. |! NH3 |! - |! Correct |! answer |! ✔b. |! SF Which |! of |! these |! ionic |! solids |! would |! have |! the |! largest |! lattice |! energy? Select |! one:
a. |! NaCl b. |! NaF c. |! CaBr d. |! CsI e. |! CaCl2 |! - |! Correct |! answer |! ✔e. |! CaCl The |! total |! number |! of |! bonding |! electrons |! in |! a |! molecule |! of |! formaldehyde |! (H2CO) |! is Select |! one: a. |! 3. b. |! 4. c. |! 6. d. |! 8. |! e. |! 18. |! - |! Correct |! answer |! ✔d. |! 8. Which |! of |! the |! following |! molecules |! has |! a |! nonzero |! dipole |! moment? Select |! one: a. |! BeCl b. |! SF c. |! KrF d. |! CO e. |! CCl4 |! - |! Correct |! answer |! ✔b. |! SF
c. |! sp d. |! sp3d e. |! sp3d2 |! - |! Correct |! answer |! ✔c. |! sp What |! is |! the |! number |! of |! lone |! electron |! pairs |! on |! the |! central |! atom |! of |! a |! molecule |! having |! a |! trigonal |! pyramidal |! molecular |! geometry, |! such |! as |! NH3? Select |! one: a. |! 1 |! b. |! 2 c. |! 3 d. |! 0 e. |! 4 |! - |! Correct |! answer |! ✔a. |! 1 For |! which |! one |! of |! the |! following |! molecules |! is |! the |! indicated |! type |! of |! hybridization |! not |! appropriate |! for |! the |! central |! atom? Select |! one: a. |! BeCl2; |! sp b. |! SiH4; |! sp c. |! BF3; |! sp2 |! d. |! C2H2; |! sp e. |! H2O; |! sp3 |! - |! Correct |! answer |! ✔a. |! BeCl2; |! sp According |! to |! the |! VSEPR |! model, |! the |! predicted |! molecular |! geometry |! of |! ammonia, |! NH3, |! is
Select |! one: a. |! linear. b. |! trigonal |! planar. c. |! bent. d. |! tetrahedral. e. |! trigonal |! pyramidal. |! - |! Correct |! answer |! ✔e. |! trigonal |! pyramidal. What |! is |! the |! mass |! of |! one |! copper |! atom? |! (NA |! = |! 6.022 |! × |! 1023 |! mol-1) Select |! one: a. |! 1.055 |! × |! 10-22 |! g b. |! 63.55 |! g |! c. |! 1 |! amu d. |! 1.66 |! × |! 10-24 |! g e. |! 9.476 |! × |! 1021 |! g |! - |! Correct |! answer |! ✔a. |! 1.055 |! × |! 10-22 |! g What |! is |! the |! percent |! sulfur |! in |! iron(III) |! sulfate? Select |! one: a. |! 28% b. |! 32% c. |! 24% |! d. |! 48% e. |! 42% |! - |! Correct |! answer |! ✔c. |! 24%
Once |! the |! following |! equation |! is |! balanced |! with |! the |! smallest |! set |! of |! whole |! number |! coefficients, |! what |! is |! the |! sum |! of |! the |! coefficients? |! (Don't |! forget |! to |! include |! coefficients |! of |! one.) __ |! SF4 |! + |! __ |! H2O |! → |! __ |! H2SO3 |! + |! __ |! HF Select |! one: a. |! 4 b. |! 6 c. |! 7 d. |! 9 |! e. |! None |! of |! these |! answers |! is |! correct. |! - |! Correct |! answer |! ✔d. |! 9 What |! is |! the |! theoretical |! yield |! of |! chromium |! that |! can |! be |! produced |! by |! the |! reaction |! of |! 40.0 |! g |! of |! Cr2O3 |! with |! 8.00 |! g |! of |! aluminum |! according |! to |! the |! chemical |! equation |! below? 2Al |! + |! Cr2O3 |! → |! Al2O3 |! + |! 2Cr Select |! one: a. |! 7.7 |! g b. |! 15.4 |! g |! c. |! 27.4 |! g d. |! 30.8 |! g e. |! 49.9 |! g |! - |! Correct |! answer |! ✔b. |! 15.4 |! g Which |! one |! of |! the |! following |! is |! a |! strong |! acid?
Select |! one: a. |! CH3COOH b. |! H2SO c. |! NH d. |! H3PO e. |! HClO3 |! - |! Correct |! answer |! ✔e. |! HClO Which |! is |! a |! Lewis |! acid? Select |! one: a. |! CH3NH b. |! BCl3 |! c. |! F- d. |! BF4- e. |! CH4 |! - |! Correct |! answer |! ✔b. |! BCl Which |! is |! an |! amphoteric |! oxide? Select |! one: a. |! Na2O b. |! MgO c. |! Al2O3 |! d. |! SO e. |! Cl2O7 |! - |! Correct |! answer |! ✔c. |! Al2O
