Chemistry concepts and calculations

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger than the volume of HCl used, would this calculate to a base concentration larger than or smaller t…

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger than the volume of HCl used, would this calculate to a base concentration larger than or smaller t…

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger than the volume of HCl used, would this calculate to a base concentration larger than or smaller t…

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger than the volume of HCl used, would this calculate to a base concentration larger than or smaller t…

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger than the volume of HCl used, would this calculate to a base concentration larger than or smaller t…

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger than the volume of HCl used, would this calculate to a base concentration larger than or smaller t…

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger than the volume of HCl used, would this calculate to a base concentration larger than or smaller t…

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger than the volume of HCl used, would this calculate to a base concentration larger than or smaller t…

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger than the volume of HCl used, would this calculate to a base concentration larger than or smaller t…

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger than the volume of HCl used, would this calculate to a base concentration larger than or smaller t…

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger than the volume of HCl used, would this calculate to a base concentration larger than or smaller t…

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger

1. In a titration between HCl and NaOH, if the volume of the NaOH used is larger than the volume of HCl used, would this calculate to a base concentration larger than or smaller t…

1. In addition to dissolved oxygen (O2), what other chemical substances or speci

1. In addition to dissolved oxygen (O2), what other chemical substances or species in natural waters are capable of oxidizing dissolved organic matter (CH2O)? In addition to the r…

1. In an EAS reaction with multiple substituents, the _____ directs the position

1. In an EAS reaction with multiple substituents, the _____ directs the position of substitution. And why? a. strongest activating group b. most deactivating group c. random subst…

1. In an addition reaction to an alkene, the a bood is AJ a nucleopbile B) an el

1. In an addition reaction to an alkene, the a bood is AJ a nucleopbile B) an electrophile C) a leavinggp D) A andB E) B and c 2. Addision reactions of alkenes are characterined b…

1. In an air-conditioned room at 19.0 C, a spherical balloon had the diameter of

1. In an air-conditioned room at 19.0 C, a spherical balloon had the diameter of 50.0 cm. When taken outside on a hot summer day, the balloon expanded to 51.0 cm in diameter. What…

1. In an electrolysis experiment such as the one you are going to perform, 47.4

1. In an electrolysis experiment such as the one you are going to perform, 47.4 mL of hydrogen gas were collected. The temperature was 23 degrees Celsius and the barometric pressu…

1. In an experiment similar to the one you performed in lab, a student mistakenl

1. In an experiment similar to the one you performed in lab, a student mistakenly assumed that the temperature of the vapor was ambient. Would the calculated molecular weight ther…

1. In an experiment, you are given a set of seven colorless aqueous solutions in

1. In an experiment, you are given a set of seven colorless aqueous solutions in glass vials labeled with numbers. The unknowns are barium chloride, sodium sulfate, potassium iodi…

1. In an ionic compound, the size of the ions affects the internuclear distance

1. In an ionic compound, the size of the ions affects the internuclear distance (the distance between the centers of adjacent ions), which affects lattice energy (a measure of the…

1. In an ionic-concentration corrosion cell involving chromium, which forms a tr

1. In an ionic-concentration corrosion cell involving chromium, which forms a trivalent ion (Cr3+), an electrical current of 7.6 mA is measured. How many at atoms per second are o…

1. In an unsaturated solution, what is the maximum concentration of Pb2+, if we

1. In an unsaturated solution, what is the maximum concentration of Pb2+, if we managed to fixed the I- concentration to 1 x 10-3M? Pbl2->Pb2+ + 2I- Ksp=7.9 x 10-9 2. 100mL Of …

1. In apue.3e/environ a. Compile & link doatexit.c i. Run doatexit ii. Capture o

1. In apue.3e/environ a. Compile & link doatexit.c i. Run doatexit ii. Capture output b. Try adding two more exits i. Make a copy 1. cp doatexit.c doatexit2.c 2. check permiss…

1. In apue.3e/environ a. Compile & link doatexit.c i. Run doatexit ii. Capture o

1. In apue.3e/environ a. Compile & link doatexit.c i. Run doatexit ii. Capture output b Try adding two more exits i. Make acopy 1cp doatexit.c doatexit2.c 2. check permissions…

1. In chemistry, enthalpy changes are defined as_____. Select one: a. being posi

1. In chemistry, enthalpy changes are defined as_____. Select one: a. being positive for endothermic (heat-absorbing) processes; b. all options are correct; c. being negative for …

1. In chemistry, one often uses a unit of charge known as the Faraday, which has

1. In chemistry, one often uses a unit of charge known as the Faraday, which has the magnitude of the charge of 1 mole of electrons. Since the Coulomb has come to be the internati…

1. In class today, two students prepared a 0.290 M solution by dissolving 49.63

1. In class today, two students prepared a 0.290 M solution by dissolving 49.63 g of sucrose (MW - 342.3 g/mol) in distilled water and diluting to the mark with distilled water us…

1. In each of A-C, below, indicate whether: a) the statement is possible under t

1. In each of A-C, below, indicate whether: a) the statement is possible under the laws of thermodynamics; b) the statement violates the First Law; c) the statement violates the S…

1. In each of the following reactions between a weak acid and a strong base, all

1. In each of the following reactions between a weak acid and a strong base, all of the acid was neutralizing by adding a stoichiometric amount of base. Write the dominant equilib…

1. In electrophilic aromatic substitution reactions, the NITROgroup is: a. a met

1. In electrophilic aromatic substitution reactions, the NITROgroup is: a. a meta-director since it destabilizes the meta-complex MORE than the ortho/para b. A meta-director since…

1. In eukaryotes, what 3 things happen to convert pre-mRNA into mature RNA? 1.5p

1. In eukaryotes, what 3 things happen to convert pre-mRNA into mature RNA? 1.5pt) 2. What is the function(s) of a spliceosome and what are they made of? (1pt) 3. Consider the fol…

1. In examining another candidate drug, CAND, for use in removing Cd2 ions from

1. In examining another candidate drug, CAND, for use in removing Cd2 ions from blood, an effective equilibrium constant for the reaction was found to be 5.0 x 1020 CAND Cd2+ Cd (…

1. In full annealing, hypereutectoid steels are furnace cooled from above A3. Wh

1. In full annealing, hypereutectoid steels are furnace cooled from above A3. Why are hypereutectoid steels furnace cooled from above A3,1? a. so all the carbides are dissolved b.…

1. In glazes what is added to keep the glaze from sliding off ? 1. In the Bronst

1. In glazes what is added to keep the glaze from sliding off ? 1.     In the Bronsted-Lowery theory, on acid is defined as _________ and a base as _______ ? 1.     Quartz glass i…

1. In ionic bonding, during the transfer of electrons between two neutrally char

1. In ionic bonding, during the transfer of electrons between two neutrally charged atoms, one electron moves from one atom to another. What are the new relative charges between t…

1. In lab last year, biochemistry students studied wheat germ acid phosphatase,

1. In lab last year, biochemistry students studied wheat germ acid phosphatase, which has the E.C. number 3.1.3.2. This enzyme has recently been purified from Arabidopsis thaliana…

1. In making the 3,5 dinitrobenzoate ester derivative, what compounds could be p

1. In making the 3,5 dinitrobenzoate ester derivative, what compounds could be present besides the ester? indicate any step in the procesure that is intended to remove a possible …

1. In one of her first books, The Darkness at the End of the Wormhole, Rose Dark

1. In one of her first books, The Darkness at the End of the Wormhole, Rose Darkly includes an alien species, the grones, that produce much less ATP per glucose than human beings …

1. In open heart surgery a much smaller amount of energy will defibrillate the h

1. In open heart surgery a much smaller amount of energy will defibrillate the heart. (a) What voltage (in kV) is applied to the 5.00 µF capacitor of a heart defibrillator that st…

1. In order to determine the bulk density of a soil, a soil core was taken from

1. In order to determine the bulk density of a soil, a soil core was taken from field 1 and the following information obtained: Volume of soil core = 200 cm3 Mass of the soil (ove…

1. In order to determine which is the best indicator to use, you need to calcula

1. In order to determine which is the best indicator to use, you need to calculate the pH at the equivalence point of the titration of KHP with NaOH. Suppose you start with 50.0 m…

1. In order to form an amide from a carboxylic acid anhydride and an amine in aq

1. In order to form an amide from a carboxylic acid anhydride and an amine in aqueous solution, what must be true about the relative rate of nucleophilic acyl substitution versus …

1. In practice, the path independence of cell potentials is assumed so that we m

1. In practice, the path independence of cell potentials is assumed so that we may calculate the potentials for net reactions by comparison of each half-reaction's reduction poten…

1. In preparation for doing an experiment, you need to prepare a buffer solution

1. In preparation for doing an experiment, you need to prepare a buffer solution with a pH of 7.8. A friend in your lab says that she has just the recipe for you, using N-2- hydro…

1. In some fields the ideal gas law is expressed as PV = MRT. M is the mass of t

1.In some fields the ideal gas law is expressed as PV = MRT. M is the mass of the gas, and there is a different R for every possible gas. Why is there a different R for every gas?…

1. In stage2, why do the 4 curves become relatively flat? Select the true statem

1. In stage2, why do the 4 curves become relatively flat? Select the true statement (only one). a) the turbo pump is slowing down, and it is caused by the fact that pressure is go…

1. In step I the alpha bromination of ketones is acid catalyzed. 3 pts a. What a

1. In step I the alpha bromination of ketones is acid catalyzed. 3 pts a. What acid is formed as Step 1 progresses? b. Why are alpha bromination reactions acid catalyzed? 2. Subst…

1. In step one, an electron adds to the alkyne at the carbon labeled ____ . 2. I

1. In step one, an electron adds to the alkyne at the carbon labeled ____. 2. In step one, if an electron adds to the alkyne at the carbon atom labeled two, then either electrons …

1. In step one, why do you weigh the solid after powdering it rather than before

1. In step one, why do you weigh the solid after powdering it rather than before? 2. In what form is the organic acid after it is extracted into an aqueous phase? 3. In what form …

1. In studying the reaction: the initial Concentration of N2O5 was 0.64 mol/L. A

1. In studying the reaction: the initial Concentration of N2O5 was 0.64 mol/L. After 30 minutes into, the reaction, all the N2O5 has reacted. a. What is the average rate of the re…