Chemistry concepts and calculations

4) The oxygen produced by an aquatic plant is collected over a period of 24 hour

4) The oxygen produced by an aquatic plant is collected over a period of 24 hours to determine the rate of photosynthesis. The chemical equation presented shows the reactants requ…

4) The reaction below takes place until the solution went from yellow to clear.

4) The reaction below takes place until the solution went from yellow to clear. If iodine was the contributor to the yellow color, how many moles of I2(aq) are present after compl…

4) The simplified mechanism below is often used to describe an enzyme, E, cataly

4) The simplified mechanism below is often used to describe an enzyme, E, catalyzing conversion of a substrate, S, to product P k2 The ATP hydrolysis activity of a helicase is oft…

4) The solubility of ferrous hydroxide, also called iron(ll) hydroxide, Fe(OH),,

4) The solubility of ferrous hydroxide, also called iron(ll) hydroxide, Fe(OH),, is 143 x 10" gram per liter at 25 C. a) Write a balanced equation for the solubility equilibrium b…

4) Three unknown solutions were prepared by pipetting 15.00 m into a 200.00 mL v

4) Three unknown solutions were prepared by pipetting 15.00 m into a 200.00 mL volumetric L of an unknown nickel solution flask and diluting to the mark. Then three samples were p…

4) Three unknown solutions were prepared by pipetting 15.00 m into a 200.00 mL v

4) Three unknown solutions were prepared by pipetting 15.00 m into a 200.00 mL volumetric L of an unknown nickel solution flask and diluting to the mark. Then three samples were p…

4) Two of the older elemental analysis methods that are still used are atomic ab

4) Two of the older elemental analysis methods that are still used are atomic absorption and atomic emission spectroscopy. The atomic emission spectroscopy method is little more t…

4) Use the periodic table to predict the charges that the following atoms will h

4) Use the periodic table to predict the charges that the following atoms will have when they form lons a) Ca b) o c) Br d) Al e) Cs 5) Describe ionic bonds and covalent bonds and…

4) Use the periodic table to predict the charges that the following atoms will h

4) Use the periodic table to predict the charges that the following atoms will have when they form lons a) Ca b) o c) Br d) Al e) Cs 5) Describe ionic bonds and covalent bonds and…

4) Use your results from Part 3 to explain what you observed with a balanced che

4) Use your results from Part 3 to explain what you observed with a balanced chemical 5) Use your results from Part 4 to explain what you observed with a balanced chemical equatio…

4) What is wrong about this figure? It is a P-V diagram of a pure substance (10

4) What is wrong about this figure? It is a P-V diagram of a pure substance (10 pts) cridial pint Cka) inrie in velune,ourt pressure as well. Pare velume that i in Hhat sulstase s…

4) What mass of CuSO 4 .5H 2 O (in grams) do you need to make 250.0 mL of a 1.50

4) What mass of CuSO4.5H2O (in grams) do you need to make 250.0 mL of a 1.50 M CuSO4 solution? 5) Calculate the mass of Sodium Phosphate trihydrate, Na3PO4 .3H2O, that is needed t…

4) When keton bodies are made and where is it used? A) Keton bodies are made in

4) When keton bodies are made and where is it used? A) Keton bodies are made in the liver and used in adipose tissue to synthesize fatty acids B) Keton bodies are made in the adip…

4) Which combination of reagents is effective in generating sodium propynide, CH

4) Which combination of reagents is effective in generating sodium propynide, CH3C?CNa? 1)What is/are the product(s) of the following acid-base mechanism? Two of these choices. Al…

4) Which level of protein structure would be most affected by the following chan

4) Which level of protein structure would be most affected by the following changes... (5 pts total) a) mutation from isoleucine to valine b) oxidation of two cysteine sidechains …

4) Which one of these species is a bidentate ligand? I got NH3 but not sure CN-,

4) Which one of these species is a bidentate ligand? I got NH3 but not sure CN-, NH3, CO, H2NCH2CH2NH2, EDTA 5) Ethylenediaminetetr aacetic (EDTA) is I got B A. Known to form comp…

4) You were on the team that developed and launched Moldavia’s first satellite (

4) You were on the team that developed and launched Moldavia’s first satellite (a low earth orbit, spy satellite).   After a few months of perfect performance and great, high reso…

4) a) Volume of hot dry air = Volume of the flask = 134.0 mL b) Temperature of h

4) a) Volume of hot dry air = Volume of the flask = 134.0 mL b) Temperature of hot dry air = 99.7oC = (99.7 +273) = 372.7 K So, (V/T)hot = (134/372.7) = 0.359 mL/K c) Volume of co…

4). A patient was administered 150 mL of D5W at a rate of 25 mL/h. If the infusi

4). A patient was administered 150 mL of D5W at a rate of 25 mL/h. If the infusion was begun at 8am, at what time was it completed? 6). A pediatric patient received 50 mL of an in…

4). You have a protein solution. You take 5 ml of the solution, and add 45 ml of

4). You have a protein solution. You take 5 ml of the solution, and add 45 ml of buffer. Youthen add 30 1ofthedil teproteinsolu ont 70ofbufferand2ml ofCon ass esolution The result…

4)All the Carbon in Hydrocarbon will completly converted to CO2 So the number of

4)All the Carbon in Hydrocarbon will completly converted to CO2 So the number of moles of CO2 = mass of CO2 / Molar mass of CO2 = 8.80 g / 44 (g/mol ) = 0.2 mol Each CO2 has 1 mol…

4)Given: CH 4 (g) -->2H 2 (g)+C(s) H=74.81KJ/mol CH 4 (g)+2O 2 (g) -->CO 2 +2H 2

4)Given:       CH4(g) -->2H2(g)+C(s)                                 H=74.81KJ/mol       CH4(g)+2O2(g) -->CO2+2H2O(l)               H=-890.37KJ/mol Calculate the H of C(s)+O…

4)Methanol can be produced by the followving reversible r CO(g) + 2H2(g)CHOH(g)

4)Methanol can be produced by the followving reversible r CO(g) + 2H2(g)CHOH(g) When 0.40 mol of CO and 0.30 mol of Ha are allowed to reach equilibrium in a 1.0 L container, 0.060…

4, (11 marks total) A natural gas consists of 90% CH, and 10% N2 by volume. Afte

4, (11 marks total) A natural gas consists of 90% CH, and 10% N2 by volume. After it is burned in a furnace, the products of combustion contain 9% CO2 by volume on a dry basis. Th…

4, Because of its cost and strength, steel components are commonly used in the c

4, Because of its cost and strength, steel components are commonly used in the construction of recreational boats and, to an even greater de large ships. As steel is predominately…

4, Consider the equation for Gibbs Free Energy, AG AH-TAS. Which set of conditio

4, Consider the equation for Gibbs Free Energy, AG AH-TAS. Which set of conditions below would result in a reaction that is unambiguously spontaneous? Which would be unambiguously…

4, Consider the equation for Gibbs Free Energy, AG AH-TAS. Which set of conditio

4, Consider the equation for Gibbs Free Energy, AG AH-TAS. Which set of conditions below would result in a reaction that is unambiguously spontaneous? Which would be unambiguously…

4, what is the oxidation number of tellunun in [HTeo a. +1 ID: A d. +2 Chapter 1

4, what is the oxidation number of tellunun in [HTeo a. +1 ID: A d. +2 Chapter 18 &19 Values The following values will be useful for problems in these chapters. Acid HF HNO2 C…

4, when solid silver nitrate is mixed with solid NaCI, no reaction occurs, but w

4, when solid silver nitrate is mixed with solid NaCI, no reaction occurs, but when a clear, transparent solution of silver nitrate is mixed with solution of Nacl, the mixture tur…

4,5&6 A graph of mass % sugar versus density of solution produces a linear line

4,5&6 A graph of mass % sugar versus density of solution produces a linear line with a positive slope. The equation of the line is y 0.0045x + 0.997. What is the mass% of suga…

4- A student measured the diameter of a sphere and determined the average value.

4- A student measured the diameter of a sphere and determined the average value. His measyrements are 5.17cm , 5.16 cm cm and 5.17 cm if the diameter is 6.18cm what can be said ab…

4- A student measured the diameter of a sphere and determined the average value.

4- A student measured the diameter of a sphere and determined the average value. His measyrements are 5.17cm , 5.16 cm cm and 5.17 cm if the diameter is 6.18cm what can be said ab…

4- An isolated rigid tank is compartmented into 2 sections \"A\" and \"B\" using

4- An isolated rigid tank is compartmented into 2 sections "A" and "B" using a thin membrane as shown in the figure. Compartment A" with a volume of 4.49 m2 contains water at a pr…

4- Determine the major and structure. Demonstrate how you were able to arrive at

4- Determine the major and structure. Demonstrate how you were able to arrive at your answer. hinors resonance structures, and prioritize the relstive stability of each resonance …

4- Determine the major and structure. Demonstrate how you were able to arrive at

4- Determine the major and structure. Demonstrate how you were able to arrive at your answer. hinors resonance structures, and prioritize the relstive stability of each resonance …

4- In the following reactions label the oxidizing and reducing agent CO 4H:0: 4H

4- In the following reactions label the oxidizing and reducing agent CO 4H:0: 4H20 5- Complete the following table: 5.6 gramk0l in500-19.6 gram of H2SO4 in ml of H2o 20 grarn of L…

4- Metabolism of propionyl-CoA in humans requires which of the following cofacto

4- Metabolism of propionyl-CoA in humans requires which of the following cofactors? a) flavin adenine dinucleotide b) cobalamine (B-12) c) thiamine pyrophosphate d) lipoic acid e)…

4- Summer16 LOPEZ/OLSON Actvities and Due Dates 1 Salls Practice Video C Sapling

4- Summer16 LOPEZ/OLSON Actvities and Due Dates 1 Salls Practice Video C Sapling LearningI CUNY. Lehman College-CHEM 11 O Assi Availal Due D Points Grade Descri Policie Gradebook …

4- The mass of an aluminum boat is 4.9682 g. The mass of an aluminum boat and mi

4- The mass of an aluminum boat is 4.9682 g. The mass of an aluminum boat and mixture of boat and a mixture of and, NaCl, and (NH4)2CO3 is 6.5172 g.After sablimation of (NH4)2CO3,…

4- disscuss the diffrence amoung number of theortical tray required for zero ref

4- disscuss the diffrence amoung number of theortical tray required for zero reflux , minimun reflux and total reflux situations in binary distillation of a mixture of benzene and…

4-6. When calcium carbonate is added to hydrochloric acid, calcium chloride, car

4-6. When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced according to the balanced chemical equation below: CaCO3(s) + 2…

4-Bromoacetanilide Synthesis. Why is it necessary to acylate aniline prior to br

4-Bromoacetanilide Synthesis. Why is it necessary to acylate aniline prior to bromination? 2. a What is meant by the terms: nucleophile and electrophile? b) In this reaction, indi…

4-Bromoacetanilide Synthesis. Why is it necessary to acylate aniline prior to br

4-Bromoacetanilide Synthesis. Why is it necessary to acylate aniline prior to bromination? 2. a What is meant by the terms: nucleophile and electrophile? b) In this reaction, indi…

4. (1 pt) Hulls of ships and, in general, other parts of boats can be protected

4. (1 pt) Hulls of ships and, in general, other parts of boats can be protected using a "sacrificial metal" Zinc or magnesium may be used for this purpose. The zinc or magnesium p…

4. (12 pts) Explain why a fourth quantum number that describes the spin of elect

4. (12 pts) Explain why a fourth quantum number that describes the spin of electrons is required to describe the properties of electrons in atoms and ions a. Describe the characte…

4. (12 pts) Explain why a fourth quantum number that describes the spin of elect

4. (12 pts) Explain why a fourth quantum number that describes the spin of electrons is required to describe the properties of electrons in atoms and ions a. Describe the characte…

4. (15 points total) Everybody wants accurate answers with minimal effort. With

4. (15 points total) Everybody wants accurate answers with minimal effort. With that in mind indicate which activity coefficient model you would select for the following applicati…

4. (15 points) Co nsider the phase change between white-Sn(s) and gray-Sn(s). Wh

4. (15 points) Co nsider the phase change between white-Sn(s) and gray-Sn(s). When white-Sn(s) is cooled at 1 atm to 286.35 K it undergoes a phase change to gray- (s). Given that …

4. (15 points) The following calibration data were obtained for the analysis of

4. (15 points) The following calibration data were obtained for the analysis of Zn using atomic absorption spectrometer Zn Concentration No. of replicates Std. deviation (s) 0.000…

4. (15 points) The following calibration data were obtained for the analysis of

4. (15 points) The following calibration data were obtained for the analysis of Zn using atomic absorption spectrometer Zn Concentration No. of replicates Std. deviation (s) 0.000…