Inorganic Chemistry Questions

17 Sodium halides crystallize in the rock salt structure which has a cubic unit cell with four formula units per unit cell A sodium halide has a density of 2 83 g cm and a unit cell edge length of 462 pm Which compound is it 2 83 N F B NaCI C NaBr D Nal

4 a How is the Lewis structure different from molecular and electron domain geometry Illustrate this by using a water molecule as an example 4 b In an experiment 5 00 g magnesium and 5 00 g oxygen gas are placed in a reaction vessel to form magnesium oxide Which is the limiting reagent and which is the excess reagent How much in grams of the excess reagent remains after the reaction

Which of the following is not a disaccharide O Maltose O Sucrose O Lactose O Glucose

True or False Increasing the temperature of a reaction speeds up the rate of the reaction by providing more kinetic energy in which the molecules can overcome the activation energy barrier O True O False

24 Which reaction has AS rxn 0 All reactants and products are liquids A B C D Br Br Br

When comparing the strength of two weak acids what factor can we use to quantify which is the stronger of the two the number of protons the acids can lose O all of the choices are correct O the formula weights of the acids the values of the pka s of the acids none of the choices are correct

When a secondary amine reacts with a carboxylic acid the major product is a an Osalt O alcohol O ester O amide O amine

3 Aluminum crystallizes in a face centered cubic unit cell with an edge length of 405 pm What is its density B 1 35 g cm D 5 40 g cm 3 A 0 674 g cm C 2 70 g cm

Which of the following is a soap O O C18H37COONa C17H35C6H4SO3Na OCH3COONa

Which compound is a secondary amine O N N dimethylethylamine O N ethyl N methylpropylamine O trimethylamine O isopropylamine diethylamine

a Draw a Fischer projection of an aldopentose and its mirror image b Label the pair of aldopentose enantiomers as L and D c What is the maximum number of stereoisomers of an aldopentose that can exist d are either or both of the aldopentoses you drew reducing or non reducing sugars Briefly explain

Which of the following is a conjugate acid of water O H3O O HCI O NH4 O OH

Draw methionine amino acid R the side chain is CH CH SCH3 in both its a zwitterionic form b at a pH 1 c True or False This amino acid can be oxidized to a disulfide compound

Which of the following occurs when hydrogen chloride gas is dissolved in water to form hydrochloric acid O H is transferred from water to HCI O H is transferred from HCI to water There is no reaction HCI molecules remain present O a complex between HCI and water is formed

In the tetrapeptide Ala Cys Val Leu the C terminal amino acid is O Phe O Val O Ala O Cys Leu

a Describe the soap making process and how soap works Include a description and drawing of a micelle b Describe the function of a lipid bilayer and compare and contrast the micelle to a lipid bilayer in terms of their chemical structures

All of the following are interactions that stabilize the tertiary structure of a protein except O Hydrogen bonding O Hydrophobic pocket O lonic salt bridges Covalent peptide bonding

When an amine behaves as a base it ion O loses hydronium O loses hydroxide O gains hydronium O gains ammonium loses ammonium a hydrogen ion to form a an

An amino acid whose R group is predominantly hydrocarbon would be classified as O neutral polar O neutral nonpolar O basic O isoelectric O acidic

Explain what a codon is and its role in peptide synthesis

This two part question has to do with the topic of stereochemistry a Is glycine chiral or achiral Briefly explain b What is the maximum number of stereoisomers that can exist for threonine Briefly explain with Fischer Projections indicating any enantiomeric or diastereomeric relationships between your drawings

Which best explains phenol the conjugate base is the most stable due to resonance O the conjugate acid is the least stable due to resonance O the conjugate base is the least stable due to resonance O the conjugate acid is the most stable due to resonance

a What is the difference between the two models the induced fit model or the lock and key model for explaining the interaction between an enzyme or protein and a substrate b Which model is superior in explaining our modern view of the enzyme substrate interaction Briefly support your answer

List ALL the nucleic acid s involved in protein synthesis

Ample of nitrogen occupies a occupy at 05 degrees Ce Boyle s Law Char Law Gay Lu has a pressure of 0 370 am at 500 C What is the pressure at standard temperatur Boyle s Lawb Charles and C Gay Lussss Lawd ak 3 Cakulate the decrease in tempera A 1953 Kelvin b 1956 Kave me of 250m at 25 degrees Celsus What volume w ve this problem low 4A400L tank of ammonis has a pressure of 12 7 AP Calculate the volume of the ammonia if its pressure is changed to 8 4 APa while its temperature remains constant 62 0 Sters b 03 0 aters 00 5 ers d 62 5 Ster 6 How many neutrons does Radon have a b 80 e 136 SA sample of Oxygen gas occupies a volume of 250 ml at 740 for pressure What volume will it occupy at 600 torr pressure Which law would you use to solve this problem A Boyle s Low b Charles Law c Gay Lussacs Law d B and C when 0 00 at 20 0 Ce compressed to 4 00 L 106 Refox3 Kevin 8 How many protons does Radon have b 86 c 136 a 222 7 How many electrons does Radon have a 222 b 86 c 136 9 How many energy levels does Radon have a 2 c 6 b 4 d 8 d 308 d 308 The most stable group of elements is the a halogens d 308 10 The vertical direction up and down on a periodic table is referred to as a periods b columns c lines d towers 11 The horizontal direction side to side on a periodic table is referred to as a periods b columns c lines d towers 12 Which of the following elements can be found in group 2 period 77 a Radon b Francium c Radium d Krypton b metalloids c alkaline earth metals d noble gasses the mass in grams of one mole of a substance is best defined as the Percent of mole b Molar mass c molar balance d None of these ich answer best defines the molar mass of sodium carbonate Na2CO3 108 2 g mole b 106 0 g mole c 160 0 g mole d 106 3 g mol

Write the reaction for the dissociation of acetic acid CH3COOH in H O If the equilibrium constant Ka 1 76 X10 5 is the reaction favored in the forward or reverse direction

a Using Fischer Projections draw all of the isomers including stereoisomers of C4H9Br b Using the IUPAC system of nomenclature name all of the molecules that you draw c Draw a circle around ALL the isomer s that are optically active

4 0 g mol c 108 1 g mol d 164 9 g mol mass of calcium nitrate Ca NO3 2 17 What is the charge on the following ionic bond Beryllium to Chlorine b 1 1 b 2 12 c 1 1 d 2 12 18 The following Lewis Dot Structure would represent what element Potassium b Thallium c Arsenic d Selenium b x 19 The concept of the mole can be used to convert between mass and number of a particles b ounces c grams d inches 20 This substance has excess hydroxide ions OH and an example is tomato sauce a acid b base c neutral d none of these 21 This pH reading has an equal number of hydrogen H and hydroxyl OH ions a acid c neutral d none of these b base 22 All of the following are properties of an acid except a reacts with metals b feels slippery c tastes sour 23 The following are products of neutralization a base and water b acid and base 24 A base has the following pH range a 0 6 b 7 c 8 14 d 15 25 25 A neutral solution has the following pH a 5 b 6 c 7 d 8 26 27 28 29 30 For the following problems match the correct number of significant figures to the corre You will not use all of the below answers and some may be used more than once a 0 SF b 1 SF c 2 SF d 3 SF e 4 SF f 5 SF g 6 SF h 7 SF i 8 SF j 9 SF 0 042 grams 0 0030460 liters 30000 grams d can be corrosive 102 450 000 grams 0 0004035 liters c salt and water d acid and water 31 What is the atomic number for the following electron configuration 1s 2 2s 2 2p 4 b 6 a 5 c 7 d 8 32 What atom matches this electron configuration 1s 2 2s 2 2p 6 3s 3 a Silicon b Aluminum c Carbon d Chlorine 33 The order of fill for an electron configuration is based on the order of energy and the lo This is known as the a Apu Principle b Krabappel Principle c Aufbau Principle 34 In the following electron configuration 1s 2 2s 2 2p 2 what is the number of valence d 8 c 6 b 4 d Flanders Pr

1 A sample of nitrogen occupies a volume of 250ml at 25 degrees Celsius What volume will It occupy at 95 degrees Celsius Which law would you use to solve this problem Boyle s Law b Charles Law c Gay Lussacs Law d B and C a 2 A gas has a pressure of 0 370 atm at 50 0 C What is the pressure at standard temperature b Boyle s Law b Charles Law c Gay Lussacs Law d B and C 3 Calculate the decrease in temperature when 6 00 L at 20 0 C is compressed to 4 00 L a 195 3 Kelvin b 195 6 Kelvin c 195 8 Kelvin d 194 3 Kelvin 4 A 40 0 L tank of ammonia has a pressure of 12 7 kPa Calculate the volume of the ammonia if its changed to 8 4 kPa while its temperature remains constant a 62 0 liters b 63 0 liters c 60 5 liters d 62 5 liters 5 A sample of Oxygen gas occupies a volume of 250 ml at 740 torr pressure What volume will it c pressure Which law would you use to solve this problem C Boyle s Law b Charles Law c Gay Lussacs Law d B and C 6 How many neutrons does Radon have a 222 b 86 c 136 7 How many electrons does Radon have a 222 b 86 C 136 8 How many protons does Radon have a 222 b 86 c 136 d 308 d 308 9 How many energy levels does Radon have a 2 b 4 c 6 d 8 d 308 10 The vertical direction up and down on a periodic table is referred to as a periods b columns c lines d towers 13 The most stable group of elements is the a halogens 11 The horizontal direction side to side on a periodic table is referred to as a periods b columns c lines d towers 12 Which of the following elements can be found in group 2 period 7 c Radium a Radon b Francium d Krypton b metalloids c alkaline earth metals d noble gasses 14 The mass in grams of one mole of a substance is best defined as the Percent of mole b Molar mass c molar balance d None of these a 15 Which answer best defines the molar mass of sodium carbonate Na2CO3 a 108 2 g mole b 106 0 g mole c 160 0 g mole d 106 3 g mol

16 Which answer best defines the molar mass of columne CO 108 1 geld 1640 g 1082 b 1040 g 17 What is the charge on the following ionic bond Berytus to Chine ax 10 1 b 2 12 1 1 4 2 0 26 27 28 29 30 18 The following Lewis Dot Dructure would represent what el Potasshum b Thallume Arsenic d Selenium a 19 The concept of the mole can be used to convert between mass and number of a particles bounces d inches e grams 20 This substance has excess hydroxide ions OH and an example is tomato sauce a acid b base e neutral d none of these 21 This pH reading has an equal number of hydrogen 4 and hydroxyl OH ions a ackd b base e neutral d none of these 22 All of the following are properties of an acid except reacts with metals b feels slippery e tastes sour d can be corrosive 23 The following are products of neutralization a base and water b acid and base c salt and water d acid and water 24 A base has the following pH range a 25 A neutral solution has the following pH a 5 b 6 c7 d e 06 b 7 c 8 14 d 15 25 For the following problems match the correct number of significant figures to the correct digit s You will not use all of the below answers and some may be used more than once 0SF b 1 SF c 2 SF d 3 SF e 4 SF 1 5 SF g 6 SF h 7 SF 1 8 SF J 9 SF 0 042 grams 0 0030460 liters 30000 grams 102 450 000 grams 0 0004035 liters 31 What is the atomic number for the following electron configuration 1s 2 2s 2 2p 4 b 6 a 5 c 7 d 8 32 What atom matches this electron configuration 1s 2 2s 2 2p 6 36 37 Silicon b Aluminum d Chlorine a c Carbon 33 The order of fill for an electron configuration is based on the order of energy and the lowest energy level fills fir This is known as the a Apu Principle b Krabappel Principle c Aufbau Principle d Flanders Principle 34 In the following electron configuration 1s 2 2s 2 2p 2 what is the number of valence electrons of this atom

c i HNO2 can have few possible structures Based on their formal charges an considerations which structure is more stable other Show the process for formal charge calculation for at least one of the atoms Formal H N O H N Charge N H 0 of N O i O ii 0 A B ii What advantages of this stable structure has over others C

36 The configuration that is desired by the atoms is that of alan a noble gas b halogen c earth metal d alkaline metal 37 Draw the Bohr model for Sodium 4 points For questions 38 43 complete the following information based on the element Sodium 38 How many protons 39 How many neutrons 40 How many electrons 41 How many valence electrons 42 What is the atomic number 43 What is the atomic mass 44 If an atom has a mass of 11 and 5 electrons its atomic number must be a 11 b 16 C 10 d 5 45 Covalent compounds form bonds by a donating b sharing c taking d None of these 46 The following elements are involved in covalent bonding a metal to metal b metal to nonmetal c nonmetal to nonmetal d halogen to noble gas 47 A molecule of NH3 contains electrons lonic bonds only b covalent bonds only c ionic and covalent bonds d neither ionic or covalent 48 In ionic bonding all metals an electron to become stable a share b accept c receive d donate 49 In ionic bonding if an atom donates an electron it becomes a positively b negatively c stable d neutral 50 Which element is most likely to form a covalent bond hydrogen charged

aluate the decrease in 195 perature when 0 001 a 200 C is compressed Kevin

A gas mixture contains 50 mol H and 50 1 00 L samples of this gas mixture are mixed with variable volumes of O2 at 0 C and 1 atm A spark is introduced to allow the mixture to undergo complete combustion The final volume is measured at 0 C and 1 atm Which graph best depicts the final volume as a function of the volume of added O A B C Final Volurne L 2 00 1 75 1 50 1 00 0 75 0 50 0 25 0 00 Final Volume L 0 00 2 00 4 75 1 50 1 25 0 75 0 50 0 25 0 00 0 00 0 25 0 50 0 75 Volume O added L 0 25 0 50 0 75 ndried L 1 00 D Final Volume L 2 00 1 75 1 50 1 25 1 00 0 75 0 50 0 25 0 00 0 00 2 00 1 75 1 50 Final Volume L 1 25 1 00 0 75 050 0 25 0 00 0 85 0 50 075 Volume O added L 0 00 1 00 0 25 0 50 0 75 Volume O added L 1 00

Acidic Solutions THE PURINA TEM IRDINEAN 2 MnO I I Mn

3 Determine the empirical formula of a binary ionic compound that is found to be 22 71 magnesium and 77 29 chlorine by mass SHOW YOUR WORK

Chartes Law Gay Lussace i As he pressure of 0 370 am at 500 C What is the pressure at standard temp Boyle s Law b Charles Law Gay Luss Band C OO L

while its temper remains constant 62 0 Mers b 63 0 liters c 60 5 ters d 02 5 ters 5A sample of Oxygen gas occupies a volume of 250 ml at 740 torr pressure What volume will it occupy at En ressure Which law would you use to solve this problem A Boyle s Law b Charles Law e Gay Lussacs Law d B and C

oline together Write a complete balanced chemical equation with states of matter for the reaction that will occur in this lab 12 Label the charge of each substance in your equation and identify the following the chemical substance that is oxidized the chemical substance that is reduced and the spectator ion 13 Determine the empirical formula of a binary ionic compound that is found to be 22 71 magnesium and 77 29 chlorine by mass SHOW YOUR WORK

a Consider CH3COONH4 What is the solution pH if this compound is dissolved in it Given the Ka of NH4 is 5 6x10 10 and Ka of CH3COOH is 1 8x10 5 Show through Clear and step by step calculation 4 marks

6 A 5 00 g mixture of potassium sulfide and potassium chloride contains 2 80 g potassium What percentage by mass of the mixture is potassium sulfide A 13 8 B 19 2 C 44 0 D 96 1

Select one 1 Dg Dg reaction below 2H O O H H 4 4 H H O H H 0 0 OH alter be 0 0 2H Tor 0

De Select one A B C D he reaction The total combined mass of A and B is 82 0 grams The mass of D is 51 0 grams What is the mass of C O 51 0 g O 31 0 g O 42 0 g O133 0 g

Select one De 18 Which of the following is the balanced chemical equation for the reaction of magnesium with nitrogen gas N2 to form magnesium nitride Mg3N2 a OMg N MgN O 3Mg N2 Mg3N2 O Mg N Mg3N2 Mg2 N2 2MgNT

5 1 000 g of a transition metal carbonate MCO3 is heated to produce the metal oxide and 0 383 g of carbon dioxide M 44 01 What is the identity of the metal M A Mn B Ni C Cu D Zn

Which of these elements can participate in hydrogen bonding Nitrogen Fluorine Oxygen Chlorine Hydrogen

De Select one O Study the chemical reaction 1 O Which statement about this reaction is correct The reaction is balanced Both sides have equal numbers of atoms The reaction is not balanced There are more carbon atoms on the products side than on the reactants side The reaction is balanced Both sides have equal numbers of carbon atoms The reaction is not balanced There are more hydrogen atoms on the reactants side than on the products side and there are more oxygen atoms on the products side than on the reactants side CH4 O2 CO2 H O

18 Conservation of Mass Question 10 Na H O NaOH H 19 Select one This chemical reaction represents the reaction of sodium Na in water H2 0 to produce sodium hydroxide NaOH and hydrogen gas H When correctly balanced the coefficient for sodium hydroxide NaOH is O 1 O 3 02 O 4

3 Select one 4 De 18 lowing When a match burns the match goes away and thus some matter is destroyed 5 O True This chemical reaction destroys matter False The atoms are not destroyed they are only rearranged O True Matter is consumed by the flame 6 O False The mass of ash is the same than the match it came from 7 8 9 10

Groups 13 14 15 16 17 Properties Phys Cal Chemical Metalloids Use odic Table The Periodic Table Nonmetals Groups 15 Properties Use Property Use Groups 14 16 Group Property Use Halogens Noble Gases Group Property Uses 49