Preparation and Properties of Compounds Questions and Answers

Match each phase transition with the prope Choose gas liquid gas liquid solid liquid liquid solid solid gas gas solid freezing reduction vaporization deposition oxidation fusion decomposition sublimation condensation combustion Choose

06 4 g of SO g 402 8 g of CaCO3 s and 110 3 g of O g react in the following fashio 2 SO g 2 CaCO3 s O g What mass in g of CaSO4 s can be produced 2 CaSO4 s 2 CO g

25 46 Are polynucleotides ictures to show how the omponents of a nucleic acid are joine ANIZATO synthesized 3 to 5 or 5 to 3 PAGES me gal at kind of Junte heterocyclic IMAGES The sugar

A fictional element has two isotopes and a molar mass of 82 51 g mol The first isotope has an tomic mass of 80 98 u and 25 18 of the element s atoms are this isotope What is the atomic nass in u of the second isotope

What is the function of K2CO3 in the formation of the sulfonamide NHCOCH3 Acetanilide Sulfathiazole NH CISO 3H HCI A CI O 4 acetamidobenzenesulphonylchloride NHCOCH3 N Synthesis of Sulfathiazole NH 2 aminothiazole NHCOCH3 p acetamidobenzenesulphonamide Intermediate

25 37 What is the difference between a gene and a chromosome 2539 What genetic information does a single gene contain 23840 How many comes are present in a human cell de ormekenler attraction holds the DNA JAZI double helix together

What amino acid sequence is coded for by the mRNA base sequence CUC AUU CCA UGC GAC GUA What anucodon sequences of URIN match the mRNA codons in Problem 25 20

5 44 If a double stranded DNA molecule is 22 G what is the percentage of A T and C Explain difference between the 3 end and the end

Predict the number of signals expected their integration splitting in the H NMR spectrum of H3CO H3C C C H I H3C O 3 signals 3H triplet 2H quartet 3H singlet O2 signals 9H singlet 1H singlet O 3 signals 3H s 3H septet 6H d O 3 signals 3H singlet 2H doublet 6H septet O 3 signals 1H septet 3H s 6H d

What are Okazaki fragments What role do they serve in DNA metabolism

1 15 points Write the structures of the monomers used for preparing the following polymers toche to 8 0H CH3 CH3 fs O 11 C H C C HNH C CH NH CICH CC13 SO NH CH2 NH O

Select one a a a O H Why are there 2 H O molecules and 2 Na atoms in the first beaker vo To show that each molecule in the drawing represents lots of molecules in the beaker Because the person who drew it forgot to use the lowest whole number ratio possible That is how many molecules filled up the space So that a whole H molecule can be formed in the after beaker

Solubility g of salt in 100 g H O 100 90 80 60 50 40 30 20 10 NANOS Cack Pb NO 2 NaCl Leh KCI KCJOS Co SO4 0 0 10 20 30 40 50 60 70 80 90 100 Temperature C 17 Which materials have the same solubility at 71 C at 23 C at 82 C 18 Which compound is most soluble at 10 C 19 Which substance is most likely a gas 20 If 30 g of KCIO is dissolved in 100 mL of water at 70 C is it saturated unsaturated or supersaturated 21 If 25 g of KCI is dissolved in 100 mL of water at 50 C is it saturated unsaturated or supersaturated 22 At which temperature do KNO KCI have the same solubility 23 At 10 C if 20 g KNO is dissolved would the solution be unsaturated saturated or supersaturated 24 At 10 C if 92 g KNO is dissolved would the solution be unsaturated saturated or supersaturated 25 At 10 C if 18 g KNO is dissolved would the solution be unsaturated saturated or supersaturated 26 For KCIO at 70 C how many grams would dissolve to make a saturated solution

1 3 Boyle s Law 1 What is the equation for Boyle s Law 1pts 2 Use the equation for Boyle s Law to explain what happens to the pressure of a compressed gas tank if you remove all of the gas from a 9 L tank and put it into a 1 L tank Assume that temperature is constant 2pts 3 Use the equation for Boyle s Law to calculate the following 2pts A piston chamber like a car engine is filled with 2 00 L of nitrogen gas at 425kPa The piston is compressed to a volume of 0 35 L What is now the pressure inside of the piston chamber Assume no gas leaked out Charles Law 4 What is the equation for Charles Law 1pt 5 Use the equation for Charles s Law to explain what happens to the temperature inside of a compressed gas canister if you squeeze and reduce the volume inside of the canister Assume that the pressure is kept constant 2pts 6 Use the equation for Charles s Law to calculate the following 2pts A plastic bottle is filled with a gas to the volume of 0 50 L at a temperature of 294 15K The bottle then placed in a freezer for 24 hours at a temperature of 273 15K What is the volume of gas inside the plastic bottle when it is taken out of the freezer

Dalton s law of partial pressures and the Ideal gas law Reminder to use the equation sheet for the equations and constants 9 You add 5 00 grams of H and 20 00 grams of N into a sealed container that has a volume of 3 00L The temperature of the container is 393 15K A Use Dalton s laws of partial pressures to explain how the H and N gasses contribute to the total pressure of the container 3pt B Calculate the moles of H was put into the container 0 5pt C Calculate the moles of N was put into the container 0 5pt D Use the ideal gas law to calculate the partial pressure of H gas inside the container 2pts E Use the ideal gas law to calculate the partial pressure of N gas inside the container 2pts F Use Dalton s law of partial pressures to calculate the total pressure of gas inside the container 1pt

572 TOICHIOMETRY What is the mass of zinc in grams required to react co Zn 2 HC1 048L 1J 20FS ZnCl H 3 nol t completely with 45 0 mL of 3 0 M HCL 10274 Imol zmol 200

Compare the structures of vitamin A and vitamin C What structural features does each have that make one water soluble and the other fat soluble

93 Trypsin is an enzyme that cleaves on the C terminal side that is to the right of all basic amino acids in a protein or peptide Consult Table 18 3 to identify basic amino acids Consider the peptide shown below Predict the fragments that would be formed by treatment of this peptide with trypsin N terminal end Leu Gly Arg Ile Met His Tyr Trp Ala C terminal end

changes to have on the rate of an enzyme catalyzed reac tion for an enzyme that has its maximum activity at bod temperature about 37 C a Raising the temperature from 37 C to 70 C b Lowering the pH from 7 to 3 c Adding an organic solvent such as methanol

N Underline 2 pronouns and explain why they are pronouns below Everybody agreed with Helen when she suggested travelling to Mexico for the winter break PRONOUN 1 T

D For the redox reaction CIOs ant Clan 12 in acid solution the number of water molecules present in the balanced equation is a 1 b 2 c 3 dl C

9 42 What kind of reaction does each of these enzymes catalyze a A dehydrase b A transmethylase c A reductase

Using the following reactions 1 2NH N O4N 3H O 2 4NH3 3021 2N21 6H O AH for the reaction N 1 2O N 0 is a 591 84 kJ b 81 5 kJ c 2541 kJ d 521 kJ AH 1010 KJ AH 1531 kJ kJ

What do we mean when we say an enzyme is saturated with substrate When an enzyme is saturated with substrate how does adding more a substrate and b enzyme affect the rate of the reaction

The equilibrium constant Kred for the reaction Sn 2Fe2Fe Sn is given Fe e Fe E 0 77 V Sn 2eSn E 0 15 V a 8 2 x 10 b 1 04 x 102 c 9 62 x 10 22 7 58 x 10 d

7 Does the equilibrium position e the relative amounts of reactants and products at equilibrium depend upon how much reactants and products are present when the reaction starts Why or why not

16 What always goes on top of an equilibrium expression 17 Which states of matter are not included in the equilibrium expression Why

6 7 FeBr2 K CrO4 8 Cu NO3 2 K PO4 9 Pb NO3 2 I Nal MnCl Co NO3 2

AT bond arises from sideways overlap of two parallel p orbital nding electron density lies above and below a plane containing the 2 nu perpendicular to the orbitals bital 1 atom2 p orbital bond atom has sp idization in a molecule The maximum number of a bonds that the atom can form is The maximum number of p p bonds that the atom can form is

8 Does the reaction stop when a system reaches equilibrium

3 List the advantages and disadvantages with the use of aspartame

O b CH3C OCH CH H O O CH C OH CH CH OH

d Sublimation 22 How much energy would it take to boil 312 grams of diethyl ether C4H 0O AHap 26 5 kJ mol a 112 kJ b 74 7 kJ C 226 kJ d 90 3 kJ 02AH

d 90 3 kJ 23 How much energy would it take to melt 5 16 grams of diethyl ether C H O AH 7 27 kJ mol a 0 881 kJ

5a Match the correct substrate and inhibitor s with each of the enzymes b For each inhibitor state if it is competitive or noncompetitive Enzymes Substrates Inhibitors 1 1 n R 2 2

12 Write a complete balanced chemical equation including states of matter for the reaction that occurs when a solid sample of zinc is placed in a solution of iron III nitrate Label the charge of each atom ion in your equation then identify the substance that is oxidized the substance that is reduced the number of electrons lost gained by each substance and apply the coefficients of the chemical equation to show the overall conservation of charge during the reaction

What is the pH of H of 6 89 x 10 14 M O 9 65 13 2 5 42 1 23 log

What is the pH of H of 6 59 x 10 10 M 1 09 18 1 23 8 19

Find the hydrogen ion H concentration for a solutions with the pH of 5 59 1 62 x 10 11 M 2 57 x 10 6 M 3 73 x 10 6 M 1 14 x 10 7 M

olutions 7 Rubbing alcohol sold in stores is aqueous 2 propanol CH CHOHCH aq Rubbing alcohol is available in concentrations of 70 and 91 2 propanol by volume To make 100 mL of 70 aqueous 2 propanol 70 mL of 2 propanol is diluted with enough water to produce a total volume of 100 mL In a laboratory Investigation a student is given a 132 mL sample of 91 aqueous 2 propanol to separate using the process of distillation Determine the maximum volume of 2 propanol in the 132 mL sample

Exercise A 5 pts Dissociation of salts in water Write an equation for the dissolving of the following salts in water Since they are made up of the conjugate acids and bases of strong acids and bases they do not interact with water when they dissolve to bl NaCl Ca NO3 2 Li SO4 NaOH prk

D what will be the new volume of the balloon in mL 55 7 Question 7 1 pts 01 501 container holds gas at 3 19 atm What would the pressure be in kPa if the container expanded to

to access important valu How many grams of K are there in a sample of K that contains 1 21x1024 atoms

3 A 73 8 gram piece of metal at 171 5 C is dropped into 325 grams of water C 4 184 J g C at 20 4 C a If the two exchange heat until the final temperature is 27 2 C find the heat capacity of the metal Then use the chart at the beginning to determine the identity of the metal

The specific heat capacity of liquid water is 4 18 J g K How many joules of heat are needed raise the temperature of 7 25 g of water from 20 0 C to 44 1 C A 41 8 J B 730 J C 1 94 x 103 J D 2 39 x 10 2 J E 66 8 J

Which of the following is NOT true O The Bronsted Lowry Model applies to a wider range of acid base phenomena than does the Arrhenius Moc O The Arrhenius Model of acids and bases was developed before the Bronsted Lowry Model The Bronsted Lowry Model can apply to bases that do not contain hydroxide ions D O The Arrhenius Model of acids and bases applies toward substances that are nonaqueous

The vapor pressure of a substance increases as temperature increases O True False

Which of these gases will effuse most quickly O Br2 O Xe O 0 O H O

The name of the molecule shown is 3 methyl 4 ethyl 1 heptene 4 ethyl 3 methyl 1 heptene 3 methyl 4 propyl 1 hexene 4 ethyl 5 methyl 6 heptene I DON T KNOW YET submit

We can draw three inequivalent Lewis structures for carbon dioxide CO concepts of formal charge and electronegativity can help us choose the structure that is the most significant representation 1 Assign formal charges to the elements in each of the structures below Formal Charge 01 C 02 0 C 0 A 0 C 0 B 0 C 0 C 2 The structure that contributes most significantly to the overall electronic of CO2 is