Chemistry concepts and calculations

1.During the lab, a step was used to decompose the excess ethanoic anhydride. Wr

1.During the lab, a step was used to decompose the excess ethanoic anhydride. Write the balanced reaction equation for the reaction used to decompose the excess ethanoic anhydride…

1.During the lab, a step was used to decompose the excess ethanoic anhydride. Wr

1.During the lab, a step was used to decompose the excess ethanoic anhydride. Write the balanced reaction equation for the reaction used to decompose the excess ethanoic anhydride…

1.Each and every class in a C++ program (by convention) are defined in how many

1.Each and every class in a C++ program (by convention) are defined in how many files? In other words, if you have a project and add a new class for it, how many files will you ha…

1.Each metal in fireworks display produces a characteristic color. What are the

1.Each metal in fireworks display produces a characteristic color. What are the frequency and color associated with each of the following. (a) Cs+, ? = 456 nm (b) Ba2+, ? = 551 nm…

1.Each metal in fireworks display produces a characteristic color. What are the

1.Each metal in fireworks display produces a characteristic color. What are the frequency and color associated with each of the following. (a) Cs+, ? = 456 nm frequency =     s-1 …

1.Each metal in fireworks display produces a characteristic color. What are the

1.Each metal in fireworks display produces a characteristic color. What are the frequency and color associated with each of the following. (a) Cs+, ? = 456 nm frequency =     s-1 …

1.Each of the following is placed in a dialyzing bag and the bag is then immerse

1.Each of the following is placed in a dialyzing bag and the bag is then immersed in distilled water. Which substances will be found inside the bag? Check all that apply. a.NaCl s…

1.Enter your answer in the provided box. Calculate the number of moles of solute

1.Enter your answer in the provided box. Calculate the number of moles of solute in 206.0 L of 0.589 M sodium cyanide. _____ moles of solute 2.Enter your answer in the provided bo…

1.Explain how an organism like dolly the sheep was cloned. 2. Explain how our dn

1.Explain how an organism like dolly the sheep was cloned. 2. Explain how our dna carries genetic material. Include in the discussion the structure of dna and how science determin…

1.Explain how the amount of sample injected onto a column affects the separation

1.Explain how the amount of sample injected onto a column affects the separation of a two-component mixture. 2.What effect would each of the following have on the retention times?…

1.Explain how you could use the simple laboratory tests performed in this experi

1.Explain how you could use the simple laboratory tests performed in this experiment to distinguish bet the following compounds a. 2-pentanone and 3-pentanone b. 3-pentanone and p…

1.Explain why sodium acetate and acetic acid together in solution make a buffere

1.Explain why sodium acetate and acetic acid together in solution make a buffered solution, but sodium chloride and hydrochloric a cid do not make a buffered solution when mixed 2…

1.Extracting characters or substrings from a larger text string is known as ? a.

1.Extracting characters or substrings from a larger text string is known as ? a.Parsing b.compiling c.rendering d.stripping 2. What is the property of the Sting class that returns…

1.Fermentation Is when microorganisms create carbohydrates from consumption of f

1.Fermentation Is when microorganisms create carbohydrates from consumption of food Is what turns milk into a commonly consumed alcoholic beverage Is when microorganisms convert c…

1.Find the electric field intensity in volts per meter between the plates of the

1.Find the electric field intensity in volts per meter between the plates of the capacitor if the separation distance is 0.50 mm. (Hint: How is the magnitude of the electric field…

1.Find the limiting reactant for each initial amount of reactants 4 Al(s) + 3 O2

1.Find the limiting reactant for each initial amount of reactants 4 Al(s) + 3 O2(g) -> 2 Al2O3(s) a. 1mol Al.1mol O2 c.16 mol Al . 13 mol O2 b.4mol Al , 2.6mol O2 d. 7.4mol Al …

1.Following the general procedure described in this experiment , a student synth

1.Following the general procedure described in this experiment , a student synthesized 6.895 g of barium idoate monhydrate, Ba(IO3)2 . H2), by adding 30.00 mL of 5.912x10^(-1) M b…

1.For a 40%Sn alloy, how much of the alpha phase (%) is there at 100 degrees C?

1.For a 40%Sn alloy, how much of the alpha phase (%) is there at 100 degrees C? 2.For a 40%Sn alloy, how much of the beta phase (%) is there at 100 degrees C? 3. For a 40%Sn alloy…

1.For a 40%Sn alloy, how much of the alpha phase (%) is there at 100 degrees C?

1.For a 40%Sn alloy, how much of the alpha phase (%) is there at 100 degrees C? 2.For a 40%Sn alloy, how much of the beta phase (%) is there at 100 degrees C? 3. For a 40%Sn alloy…

1.For an aqueous solution of sodium chloride (NaCl) determine the molarity of 3.

1.For an aqueous solution of sodium chloride (NaCl) determine the molarity of 3.35 L of a solution that contains 161 g of sodium chloride 2.determine the volume of solution that w…

1.For each pair of covalently bonded atoms, choose the one expected to have the

1.For each pair of covalently bonded atoms, choose the one expected to have the higher bond energy. (A) CC (B) C=C...... (A,B) (C) C=N (D) C-N...... (C,D) 2. For each pair of cova…

1.For the decomposition of Ni(CO)4 in the gas phase, these rate constants were o

1.For the decomposition of Ni(CO)4 in the gas phase, these rate constants were obtained experimentally. T(? C)                                            k(s-1) 47.3              …

1.For the reaction 2 A(aq) B(aq) + C(aq) a) the standard Gibbs free enthal

1.For the reaction 2 A(aq) <---> B(aq) + C(aq) a) the standard Gibbs free enthalpy change is 1.38 kJ at 25oC. The initial concentration of A(aq) is 0.503 M, the initial conc…

1.For the reaction H2(g) + I2(g) 2HI(g), Kc = 50.2 at 445ºC. If [H2] = [I2] = [H

1.For the reaction H2(g) + I2(g) 2HI(g), Kc = 50.2 at 445ºC. If [H2] = [I2] = [HI] = 1.75 × 10–3 M at 445ºC. Which of the following is true based on the above? A) Qc > Kc, the …

1.For the reaction of nitric acid and magnesium acetate choose the reactants and

1.For the reaction of nitric acid and magnesium acetate choose the reactants and products that belong in the total ionic equation from the list below. Identify any spectator ions.…

1.For the reaction: 2NO(g) + 2H 2 (g) N 2 (g) + 2H 2 O(g) the following data at

1.For the reaction:     2NO(g) + 2H2(g)      N2(g) + 2H2O(g)       the following data at 1280 ºC was obtained:             Exp #               [NO]                             [H2…

1.Getting string input 2.Designing and implementing a counted loop 3.Designing a

1.Getting string input 2.Designing and implementing a counted loop 3.Designing and implementing a post-test loop 4.Keeping track of a previous value 5.Implementing data validation…

1.Given Example 10.4.4 and Theorem 10.4.5 in the textbook, explain how you would

1.Given Example 10.4.4 and Theorem 10.4.5 in the textbook, explain how you would transform the matching problem into a maximal flow problem. 2.Once you complete question 1, use th…

1.Given Example 10.4.4 and Theorem 10.4.5 in the textbook, explain how you would

1.Given Example 10.4.4 and Theorem 10.4.5 in the textbook, explain how you would transform the matching problem into a maximal flow problem. 2.Once you complete question 1, use th…

1.Given the balanced equation, enter the formula and state of the product that f

1.Given the balanced equation, enter the formula and state of the product that formed from the reducing agent. If more than one answer exists, separate by a comma. Al(s) + 3Ag+(aq…

1.Given the following data for the reaction A ® B, determine the activation ener

1.Given the following data for the reaction A ® B, determine the activation energy, Ea, of the reaction. k (M/s) T (K) 0.681 500 0.715 1,000 2.05 ´ 10–2 kJ/mol 405 J/mol 6.90 J/mo…

1.Given the following mole fraction and vapor pressures for miscible liquids A a

1.Given the following mole fraction and vapor pressures for miscible liquids A and B, calculate the composition (in mole percentage) of the vapor from a distilling an ideal binary…

1.Given the following standard reduction potentials, Ag^+(aq) + e^- --> Ag(s) Eo

1.Given the following standard reduction potentials, Ag^+(aq) + e^- --> Ag(s) Eo=0.80V AgCN(s) + e^- --> Ag(s) + CN^-(aq) Eo=-0.01V Calculate the solubility product of AgCN …

1.Given the substrate,Select the choice for the most likely substitution mechani

1.Given the substrate,Select the choice for the most likely substitution mechanism and the reason for that mechanism. 2.Select the dominant mechanistic pathway when 2-bromobutane …

1.How are H° and qsys related? Question options: H° = qsys H° = -qsys -H° = qsys

1.How are H° and qsys related? Question options: H° = qsys H° = -qsys -H° = qsys H° = qsys + qsurr 2.In the equilibrium expression for the dissolution of urea, why don't the water…

1.How are you going to use the ideal gas law to find the molar mass of a gas in

1.How are you going to use the ideal gas law to find the molar mass of a gas in this experiment? Select one: a. to calculate the pressure of the gas b. to calculate the volume of …

1.How do we figure out the reaction order for a particular reactant? (a) We get

1.How do we figure out the reaction order for a particular reactant? (a) We get it from the stoichiometric coefficient. (b) We get it from the ratio of concentrations and the rati…

1.How do we figure out the reaction order for a particular reactant? (a) We get

1.How do we figure out the reaction order for a particular reactant? (a) We get it from the stoichiometric coefficient. (b) We get it from the ratio of concentrations and the rati…

1.How is the 0% T set in the Spec 20? What happens to the light beam when this c

1.How is the 0% T set in the Spec 20? What happens to the light beam when this control is being adjusted? How is the 100% T set in the Spec 20? What happens to the light beam when…

1.How is the 0% T set in the Spec 20? What happens to the light beam when this c

1.How is the 0% T set in the Spec 20? What happens to the light beam when this control is being adjusted? How is the 100% T set in the Spec 20? What happens to the light beam when…

1.How many electrons have the following quantum numbers: n 6,1-3, m, 2? Show wor

1.How many electrons have the following quantum numbers: n 6,1-3, m, 2? Show work clearly . How many electrons can have the quantum numbers n-4.1 2, m, +1/2? Show work clearly. . …

1.How many electrons of an Ar atom have angular momentum quantum number l = 0 at

1.How many electrons of an Ar atom have angular momentum quantum number l = 0 at ground state? Type in only the number in Arabic for your answer. 2."No two electrons in an atom ca…

1.How many grams of ammonium chloride (NH4Cl) can be dissolved in 200 grams of w

1.How many grams of ammonium chloride (NH4Cl) can be dissolved in 200 grams of water at 90°C? Show calculation. 2.At 50°C, 80 g of KNO3 is dissolved in 100 g of water. Is this sol…

1.How many kilojoules of heat must be supplied to 6.2 g of ice at -35 o C to con

1.How many kilojoules of heat must be supplied to 6.2 g of ice at -35 oC to convert it to steam at 152 oC? Use the following specific heats in J/g-oC: ice=2.0 liquid = 4.2 steam =…

1.How many milliliters of 0.0050 N KOH are required to neutralize 53 mL of 0.005

1.How many milliliters of 0.0050 N KOH are required to neutralize 53 mL of 0.0050 N H2SO4 ? 2.How many milliliters of 0.0050 N KOH are required to neutralize 53 mL of 0.0050 M H2S…

1.How many milliliters of water at 25.0°C with a density of 0.997 g/mL must be m

1.How many milliliters of water at 25.0°C with a density of 0.997 g/mL must be mixed with 181 mL of coffee at 97.2°C so that the resulting combination will have a temperature of 5…

1.How many minutes would it take for 2.15 grams of nickel to be plated from a Ni

1.How many minutes would it take for 2.15 grams of nickel to be plated from a Ni2+ solution if the current is 0.850 amps? (Molar mass of nickel is 58.69 g/mol) 2.Which of these me…

1.How many moles of H 2 SO 4 are there in 200 mL of 0.1 M H 2 SO 4 ? 2.How many

1.How many moles of H2SO4 are there in 200 mL of 0.1 M H2SO4? 2.How many grams of H2SO4 are dissolved in 200 mL of 5.0 M H2SO4? (The molar mass of H2SO4 is 98 g.) 3. 4.9 g of H2SO…

1.How much heat (in kJ) is required to warm 13.0 g of ice, initially at -10.0 C,

1.How much heat (in kJ) is required to warm 13.0 g of ice, initially at -10.0 C, to steam at 109.0 C? The heat capacity of ice is 2.09 J/gC and that of steam is 2.01 J/gC. 2. How …

1.How much water would be needed to completely dissolve 1.79 L of the gas at a p

1.How much water would be needed to completely dissolve 1.79 L of the gas at a pressure of 720 torrand a temperature of 21 C? A gas has a Henry's law constant of 0.183 M/atm . 2.T…