Chemistry concepts and calculations

3) Assume you mix 100.0 mL of 0.200 M NaOH solution with 50.0 mL of 0.400 M HBr

3) Assume you mix 100.0 mL of 0.200 M NaOH solution with 50.0 mL of 0.400 M HBr solution in a coffee cup calorimeter. The temperature of both solutions before mixing was 22.50 deg…

3) Calculate average volume of NaOH used in titrations of acetic acid and corres

3) Calculate average volume of NaOH used in titrations of acetic acid and corresponding concentration of vinegar sample (before dilution) both in terms of molarity and %(V/V). a) …

3) Calculate the Rf value if the distance traveled by spot is given as 0 012em a

3) Calculate the Rf value if the distance traveled by spot is given as 0 012em and the distano traveled by solvent front is given as 9em (Spts) 4) In an experiment to determine th…

3) Calculate the density of combustion gases with the following composition: 75%

3) Calculate the density of combustion gases with the following composition: 75% 5.5% Oz, 11% COz. 8.4% H2O, and 0.1% CO. The temperature is 350°F and the pressure is 855 mm Hg. 4…

3) Calculate the molalities of the following aqueous solutions: (a) 1.22 solutio

3) Calculate the molalities of the following aqueous solutions: (a) 1.22 solution-1 .12 g/mL), (b) 0.87 M NaOH solution (density of solution = 1 04 g/mL), (c) 5.24 M NaHCO3 soluti…

3) Calculate the molalities of the following aqueous solutions: (a) 1.22 solutio

3) Calculate the molalities of the following aqueous solutions: (a) 1.22 solution-1 .12 g/mL), (b) 0.87 M NaOH solution (density of solution = 1 04 g/mL), (c) 5.24 M NaHCO3 soluti…

3) Calculate the molalities of the following aqueous solutions: a)1.22 Mglucose

3) Calculate the molalities of the following aqueous solutions: a)1.22 Mglucose (C&H1n06;) solution (density of solution = 1 12 ginL), (b) 087 MNaOH solution (density of solut…

3) Carbonated beverages such as soda, beer, or sparkling water are produced by d

3) Carbonated beverages such as soda, beer, or sparkling water are produced by dissolving CO2 in the aqueous beverage: CO2(g) CO2(aq) a. Calculate G° of dissolution for CO2. Is it…

3) Circle the intermolecular force that accounts for the difference in the follo

3) Circle the intermolecular force that accounts for the difference in the following cases: (5) The boiling point of hydrogen fluoride (HF) is 20°C, while the boiling point of hyd…

3) Citric acid is a weak organic acid found in citrus fruits and some soft drink

3) Citric acid is a weak organic acid found in citrus fruits and some soft drinks. It is an important intermediate in the citric acid cycle and therefore occurs in the metabolism …

3) Consider the reaction: 2S02(g) + O2(g) rightleftharpoons 2SO3(g) Delta H? = -

3) Consider the reaction: 2S02(g) + O2(g) rightleftharpoons 2SO3(g) Delta H? = - 196.6 kJ/mol The equilibrium is displaced to the left if: A) the temperature is raised B) some sul…

3) Copper forms stable four-coordinate complexes with 1,10-phenanthrolines. 1,10

3) Copper forms stable four-coordinate complexes with 1,10-phenanthrolines. 1,10-phenanthroline (phen) 2,9-dimethyl-1,10-phenanthroline (dmp) 2,9-di-tert-buty-1,10-phenanthroline …

3) Data for the vapor pressure of an unknown liquid are given below T (C) p (tor

3) Data for the vapor pressure of an unknown liquid are given below T (C) p (torr) T (°C) p (torr) 51.7 58.1 64.8 245 281 358 459 67.7 76.2 79.6 81.2 496 655 722 765 The above dat…

3) Data for the vapor pressure of an unknown liquid are given below T (C) p (tor

3) Data for the vapor pressure of an unknown liquid are given below T (C) p (torr) T (°C) p (torr) 51.7 58.1 64.8 245 281 358 459 67.7 76.2 79.6 81.2 496 655 722 765 The above dat…

3) Determine # each salt will frm a solution that is acidic, basic, or pH-neutra

3) Determine # each salt will frm a solution that is acidic, basic, or pH-neutral. Explain your the equation if it is either acidic or basic. (12pts) answer and show taq) Chaunay …

3) Following is incorrect about a phase diagram. A. It gives information on tran

3) Following is incorrect about a phase diagram. A. It gives information on transformation rates. B. Relative amount of different phases can be found under given equilibrium condi…

3) For recrystallization of 3g impure naphthalene (2.7g pure naphthalene inside)

3) For recrystallization of 3g impure naphthalene (2.7g pure naphthalene inside), one student get only 0.5g product. Why? Choose 5 reasons which may lead to the low yield, from th…

3) Formic acid, HFor, has a Ka value equal to about 1.8x10-4. A student is asked

3) Formic acid, HFor, has a Ka value equal to about 1.8x10-4. A student is asked to prepare a buffer having a pH of 3.40 from a .10M HFor and a .10M NaFor solution. How many milli…

3) Given the 2nd series of experiments, consider these questions (24): For each

3) Given the 2nd series of experiments, consider these questions (24): For each of the reactions you ran, what is the balanced equation for each reaction? Cu(NO3)2 + Na Nal + FeCl…

3) Given the 2nd series of experiments, consider these questions (24): For each

3) Given the 2nd series of experiments, consider these questions (24): For each of the reactions you ran, what is the balanced equation for each reaction? Cu(NO3)2 + Na Nal + FeCl…

3) Here is a drawing of the active site for the reaction we saw in class: lactat

3) Here is a drawing of the active site for the reaction we saw in class: lactate dehydrogenase (LDH). This reaction, like many in metabolic pathways is reversible. In the drawing…

3) Here is a problem about equilibrium constants and standard states involving t

3) Here is a problem about equilibrium constants and standard states involving the solubility of KCl in water. We said in class that the activity of water solvent is a(H20) Y(H20)…

3) How does the entropy change in each of the following reactions? 3.1) Steam he

3) How does the entropy change in each of the following reactions? 3.1) Steam heats from 100C to 120C a) Entropy Decreases b) Entropy Increases c) No Change 3.2) A pound of Sucros…

3) Identify a gas. 3) A) iron B) mercury C) silver D) hydrogen E) phosphorus ) W

3) Identify a gas. 3) A) iron B) mercury C) silver D) hydrogen E) phosphorus ) Which of the following are examples of physical change? 4) A) Ice melts B) Dry ice sublimes C) Powde…

3) In addition to experimental parameters, like temperature and stirring, s olub

3) In addition to experimental parameters, like temperature and stirring, s olubility of For ions in water for Chem 110 depended on polovi and instance, LiCI molecules in organic …

3) In addition to experimental parameters, like temperature and stirring, s olub

3) In addition to experimental parameters, like temperature and stirring, s olubility of For ions in water for Chem 110 depended on polovi and instance, LiCI molecules in organic …

3) In the following reaction sequences, NAD+ is converted to NADH and FAD is con

3) In the following reaction sequences, NAD+ is converted to NADH and FAD is converted to FADH2. Identify which compound s being oxidized and which is being reduced; in addition, …

3) In the iodine clock reaction, you are measuring the rate of the reaction of i

3) In the iodine clock reaction, you are measuring the rate of the reaction of iodide ion with peroxydisulfate ion (S20s I (Reaction 1) The rate of the reaction is measured by det…

3) In the resistor network below R, and R, are in series with the parallel equiv

3) In the resistor network below R, and R, are in series with the parallel equivale resistance of the parallel resistors: R,R,. don't assume a number). Write a function that takes…

3) It is a type of redox titration in which one substance undergo oxidation and

3) It is a type of redox titration in which one substance undergo oxidation and other one gets reduced. In present case , titration occurs between KMnO4 and oxalic acid, this titr…

3) Kd for \"A\" = C (ligroin) / C (water) = 8.0 a) What weight of \"A\" can be r

3) Kd for "A" = C (ligroin) / C (water) = 8.0 a) What weight of "A" can be removed from a solution that contains 6.00 grams of "A" in 50.0-mLs of water by a SINGLE EXTRACTION usin…

3) Kd for \"A\" = C (ligroin) / C (water) = 8.0 a) What weight of \"A\" can be r

3) Kd for "A" = C (ligroin) / C (water) = 8.0 a) What weight of "A" can be removed from a solution that contains 6.00 grams of "A" in 50.0-mLs of water by a SINGLE EXTRACTION usin…

3) Let\'s do the numbers: (This question is worth 10 points total. All parts are

3) Let's do the numbers: (This question is worth 10 points total. All parts are 1 point each except for part h, worth 3 points) a. How many different nucleotides are used in RNA s…

3) Most wine is prepared by the fermentation of the glucose ingrape juice by yea

3) Most wine is prepared by the fermentation of the glucose ingrape juice by yeast: C6H12O6 (aq) à 2 C2H5OH (aq) + 2 CO2 (g) How many grams of glucose should there be in grape jui…

3) On the same oil derrick job (Some oil derricks on the north slope of Alaska i

3) On the same oil derrick job (Some oil derricks on the north slope of Alaska installed by your Texas firm last summer performed fine for six months, then failed catastrophically…

3) Part A Identify the nuclide produced when uranium-238 decays by alpha emissio

3) Part A Identify the nuclide produced when uranium-238 decays by alpha emission: 238 92U42He + ?Express your answer as an isotope using prescripts. B) Identify the nuclide produ…

3) Please order the following compounds in order of a) increasing retention time

3) Please order the following compounds in order of a) increasing retention time in a GC analysis, b) increasing Rf value in a TLC experiment. (Please assume that the separation c…

3) Potassium perchlorate is prepared by the following sequenceof reactions: Cl2

3) Potassium perchlorate is prepared by the following sequenceof reactions: Cl2 (g) + 2 KOH (aq) à KCl (aq) + KClO (aq) + H2O(l) 3 KClO (aq) à 2 KCl (aq) + KClO3 (aq) 4 KClO3 (aq)…

3) Potassium-40 decays to argon-40 with a half-life of 1.27 x 109 yr. The age of

3) Potassium-40 decays to argon-40 with a half-life of 1.27 x 109 yr. The age of a mineral sample that has a mass ratio of 40Ar to 40K of 0.330 is yr. Answer: 5.23 x 108 4) If we …

3) Salt, NaCI, has a solubility of 35.7 g per 100 g of water at 0°C. The solubil

3) Salt, NaCI, has a solubility of 35.7 g per 100 g of water at 0°C. The solubility of salt in water does not vary appreciably with temperature. NaCl is an electrolyte that common…

3) Scientists measure the amount of light passing through a sample in terms of p

3) Scientists measure the amount of light passing through a sample in terms of percent transmittance (%T). Percent transmittance is the fraction of original light that passes thro…

3) Solid Nal is slowly added to a solution that is 0.010 M in Cu\' and 0.010 M i

3) Solid Nal is slowly added to a solution that is 0.010 M in Cu' and 0.010 M in Ag. (a) Which compound will begin to precipitate first? (b) Calculate [Ag'] when Cul just begins t…

3) Text (17.82) You pour 108 cm3 of ethanol, at a temperature of -10 o C, into a

3) Text (17.82) You pour 108 cm3 of ethanol, at a temperature of -10 o C, into a graduated cylinder initially at 20 o C, filling it to the very top. The cylinder is made of glass …

3) The empirical formula of a compound with molecules containing 12 carbon atoms

3) The empirical formula of a compound with molecules containing 12 carbon atoms, 14 hydrogen atoms, and 6 oxygen atoms is (circle one answer, 5 points) 4) Which number correctly …

3) The figure at the right shows your experimental setup for estimating the trip

3) The figure at the right shows your experimental setup for estimating the triple point of CO2. Carefully mark off your capillary tube in ten 1 cm segments and note the position …

3) The following graphs are all of the same experimental data. The portion of th

3) The following graphs are all of the same experimental data. The portion of the data chosen for the linear regression analysis varies in Figs. 1-4. Examine the differing analyse…

3) The following “cycle of copper” experiment is performed in some general chemi

3) The following “cycle of copper” experiment is performed in some general chemistry laboratories. The series of reactions starts with copper wire and ends with metallic copper. T…

3) The list below shows the reduction potentials for ten different metal ions. (

3) The list below shows the reduction potentials for ten different metal ions. (a) Calculate AE for the redox reaction: Ni(s) +Mn2 (aq)- Ni(aq)+Mn(s) Will this reaction occur spon…

3) The mineral brucite (Mg(OH) 2 (s)) precipitates when dilute groundwater react

3)     The mineral brucite (Mg(OH)2(s)) precipitates when dilute groundwater reacts with magnesium-rich rocks of the California coast ranges. The reaction consumes hydroxyl ions a…

3) The polarity of a molecule is a consequence of its structure and is one of th

3) The polarity of a molecule is a consequence of its structure and is one of the determinants of the physical and chemical characteristics exhibited by the molecule. If you have …