Chemistry concepts and calculations

1. Assuming constant pressure. What will the volume of gas be at -12 degrees cel

1. Assuming constant pressure. What will the volume of gas be at -12 degrees celsius, when the balloon started at 250 mL at 25 degrees celsius? 2. Assuning constant temperature. W…

1. Assuming that all of the SCN- added to mixture #1 exists as [FeSCN]2+ at equi

1. Assuming that all of the SCN- added to mixture #1 exists as [FeSCN]2+ at equilibrium, determine [FeSCN]2+ eq for mixture #1. 2. Use the absorbable of [FeSCN]2+ eq For mixture #…

1. Assuming that the extraction of the 30 mL 1-octanol solution containing 1.00

1. Assuming that the extraction of the 30 mL 1-octanol solution containing 1.00 g of o-Cresol is done with 30 mL of NaOH(aq), and that all the o-Cresol is converted into sodium o-…

1. Assuming that the gases do not react with each other, what is the total press

1. Assuming that the gases do not react with each other, what is the total pressure, in atm, in the container if the partial pressure of the O2 gas is 2.1 atm? 2. A gas mixture co…

1. Assuming that your identification of the unknown metal is correct, write the

1. Assuming that your identification of the unknown metal is correct, write the specific half-reaction that occured at the anode for your metal in this experiment? (my metal was N…

1. Assuming the following reaction proceeds in the forward direction, 3 Sn^4+(aq

1. Assuming the following reaction proceeds in the forward direction, 3 Sn^4+(aq) + 2 Cr(s) right arrow 3 Sn^2+(aq) + 2 Cr^3+(aq) a. Sn^4+(aq) is the reducing agent and Cr(s) is t…

1. Assuming the gases are ideal, calculate the amount of work done, in joules, f

1. Assuming the gases are ideal, calculate the amount of work done, in joules, for the conversion of 1.00 mole of Ni to Ni(CO)4 at 75°C in the reaction below. The value of R is 8.…

1. At 1500K, the equilibrium constant for the reaction N 2 (g) + O 2 (g) ® 2NO(g

1. At 1500K, the equilibrium constant for the reaction N2 (g) + O2(g) ® 2NO(g) has a value of 1.0x10-5. Calculate the concentration of N2 at equilibrium if initially 0.25 mol of N…

1. At 25°C the rate constant for the first-order decomposition of a pesticide so

1. At 25°C the rate constant for the first-order decomposition of a pesticide solution is 1.50 * 10–3 min–1.  If the starting concentration of pesticide is 0.750 M, what concentra…

1. At 25°C, 298.25 mL of an aqueous solution of NiCl2 with a molar analytical co

1. At 25°C, 298.25 mL of an aqueous solution of NiCl2 with a molar analytical concentration of 0.00004873 M is added to 487.37 mL of an aqueous solution of AlBr3with a molar analy…

1. At 298 K, bar of H2 gas is placed in a 1.00 L vessel that also contains a lar

1. At 298 K, bar of H2 gas is placed in a 1.00 L vessel that also contains a large excess of I2 solid (and some I2 vapor). Under these conditions, the partial pressure of I2 vapor…

1. At 323*C, there are 0.10 moles H 2 (g), 0.20 moles HClO 4 (g), 0.10 moles H2O

1. At 323*C, there are 0.10 moles H2 (g), 0.20 moles HClO4 (g), 0.10 moles H2O (g), and 0.36 moles HCl (g) at equilibrium in a 400-mL flask equilibrium mixture. What is the value …

1. At 400 degrees C, carbon monoxide and water react to form carbon dioxide and

1. At 400 degrees C, carbon monoxide and water react to form carbon dioxide and hydrogen according to the following reaction. CO(g) + H20(g) = CO2(g) + H2(g) a) Write the expressi…

1. At 60°F, freon-12 (dichlorodifluoromethane) has a vapor pressure of 72.4 poun

1. At 60°F, freon-12 (dichlorodifluoromethane) has a vapor pressure of 72.4 pounds per square inch (1.0 atm = 14.7 psi). If I opened a pressure vessel containing liquid freon-12 a…

1. At 60°F, freon-12 (dichlorodifluoromethane) has a vapor pressure of 72.4 poun

1. At 60°F, freon-12 (dichlorodifluoromethane) has a vapor pressure of 72.4 pounds per square inch (1.0 atm = 14.7 psi). If I opened a pressure vessel containing liquid freon-12 a…

1. At STP, how many moles of helium gas would occupy 8.00 liters? Make sure to i

1. At STP, how many moles of helium gas would occupy 8.00 liters? Make sure to include the correct unit symbol with the answer choice. 2. A gas sample in a closed expandable conta…

1. At a certain temperature, the equilibrium constant for the following chemical

1. At a certain temperature, the equilibrium constant for the following chemical equation is 2.80. At this temperature, calculate the number of moles of NO2(g) that must be added …

1. At an underwater depth of 255 ft , the pressure is 8.36 atm . What should the

1. At an underwater depth of 255 ft , the pressure is 8.36 atm . What should the mole percent of oxygen be in the diving gas for the partial pressure of oxygen in the mixture to b…

1. At constant pressure, the sign of q for the process H2O(l) ? H2O(g) is expect

1. At constant pressure, the sign of q for the process H2O(l) ? H2O(g) is expected to be (a) positive, and the process is exothermic. (b) negative, and the process is endothermic.…

1. At constant volume, the heat of combustion of a particular compound, compound

1. At constant volume, the heat of combustion of a particular compound, compound A, is –3409.0 kJ/mol. When 1.277 g of compound A (molar mass = 117.77 g/mol) was burned in a bomb …

1. At room temperature a pure sample of 2?Pyridinecarboxaldehyde exists in what

1. At room temperature a pure sample of 2?Pyridinecarboxaldehyde exists in what physical state and appears what color? a. solid-brown b. liquid - clear yellow c. liquid - clear d.…

1. At several points in the synthesis of para-Aminobenzoic Acid (PABA), having t

1. At several points in the synthesis of para-Aminobenzoic Acid (PABA), having the correct acidity/basicity of the solution is critical in obtaining a good yield of product. In an…

1. At the beginning of an enzyme-catalyzed reaction, during the short period of

1. At the beginning of an enzyme-catalyzed reaction, during the short period of time in which initial velocity measurements are made, the ________ is negligible. options: formatio…

1. At what temperature (in °C) does a reaction go from being spontaneous to nons

1. At what temperature (in °C) does a reaction go from being spontaneous to nonspontaneous if it has ?H = -171 kJ/mol and ?S = -161 J/mol K ? 2. The Kb for a specific weak base ha…

1. At what temperatures will a reaction be spontaneous if ? r H ? = +62.4 kJ and

1. At what temperatures will a reaction be spontaneous if ?rH? = +62.4 kJ and ?rS? = +301 J/K? a. All temperatures below 207 K. b. All temperatures above 207 K. c. Temperatures be…

1. Automobiles are often implicated as contributors to global warming because th

1. Automobiles are often implicated as contributors to global warming because they are a source of the greenhouse gas CO2. How many pounds of CO2 would your car release in a year …

1. Balance chemical reactions. 2. Concepts: a. Dissolve b. Hydrolysis c. Solvate

1. Balance chemical reactions. 2. Concepts: a. Dissolve b. Hydrolysis c. Solvate d. Melt e. Ionize f. Solvate What is a cation? What is an anion? What is the relative number of pr…

1. Balance each of the following redox reactions using the half-reaction method.

1.   Balance each of the following redox reactions using the half-reaction method. Show your work. P.S. OK, this should definitly show this time.

1. Balance the equation for the reaction and write the coefficients in the blank

1. Balance the equation for the reaction and write the coefficients in the blanks for the total molecular equation and the net ionic equation. Na3PO4?12H2O+BaCl2?2H2O?>Ba3(PO4)…

1. Balance the equation for the reaction and write the coefficients in the blank

1. Balance the equation for the reaction and write the coefficients in the blanks for the total molecular equation and the net ionic equation. Na3PO4*12H2O+BaCl2?2H2O?->Ba3(PO4…

1. Balance the equation for the reaction and write the coefficients in the blank

1. Balance the equation for the reaction and write the coefficients in the blanks for the total molecular equation and the net ionic equation. Na3PO4?12H2O+BaCl2?2H2O?>Ba3(PO4)…

1. Balance the equation for the reaction and write the coefficients in the blank

1. Balance the equation for the reaction and write the coefficients in the blanks for the total molecular equation and the net ionic equation. Na3PO4*12H2O+BaCl2?2H2O?->Ba3(PO4…

1. Balance the equations given below and classify each as a precipitation, acid-

1. Balance the equations given below and classify each as a precipitation, acid-base, hydration (or dehydration), or oxidation-reduction reaction. a)--CaO(s) + HCI(aq) CaCl2(aq) +…

1. Balance the following chemical reaction in acidic conditions using the lowest

1. Balance the following chemical reaction in acidic conditions using the lowest possible whole number coefficients. (Enter coefficients for one and zero. Blanks will be marked in…

1. Balance the following chemical reaction in acidic conditions using the lowest

1. Balance the following chemical reaction in acidic conditions using the lowest possible whole number coefficients. Enter coefficients for one and zero. Blanks will be marked inc…

1. Balance the following equation in basic conditions. Phases are optional. SO3(

1. Balance the following equation in basic conditions. Phases are optional. SO3(2-) + CO(OH)2 >>>> Co + SO4 (2-) 2. NiCl3 is a strong electrolyte. Determine the concen…

1. Balance the following equations, and classify each as eitherprecipitation, ac

1. Balance the following equations, and classify each as eitherprecipitation, acid-base, or oxidation-reduction. a. _____NaNO3 ? _____NaNO2 + ____O2 _____________________ b. _____…

1. Balance the following reactions and determine the reducing agent and oxidizin

1. Balance the following reactions and determine the reducing agent and oxidizing agent for each reaction. ____N2H4 + ____ClO3- + ____-OH à ____NO3- + ____Cl- + ____H2O ____NaClO3…

1. Balance the following reactions then tell which are metathesis (double replac

1. Balance the following reactions then tell which are metathesis (double replacement) reactions a) Caco, + 2HNO3 Ca(NO3)2 + CO2 + H2O b) BaCl2 + Na2SO4 BaSO4 + Nacl c) Pb(NO3)2 +…

1. Balanced Reaction a. You add 1.00 mL tert-butyl chloride to 100.0 mL of your

1. Balanced Reaction a. You add 1.00 mL tert-butyl chloride to 100.0 mL of your organic solvent (soln A). Calculate the concentration (moles/liter) of tert-butyl chloride in your …

1. Barium chloride and sodium sulfate react according to the following equation.

1. Barium chloride and sodium sulfate react according to the following equation. BaCl2 + Na2SO4 BaSO4 + 2NaCl How many grams of barium sulfate can be produced from 23.2 g of bariu…

1. Based on structure (figure 1), rank them in terms of increasing polarity for

1. Based on structure (figure 1), rank them in terms of increasing polarity for the organic compounds -Carotene, Alizarin Red (1,2-dihydroxyanthraquinone sulfonate), and Thymol Bl…

1. Based on the Eo values in appendix 1 at the end of your lab manual, rank each

1. Based on the Eo values in appendix 1 at the end of your lab manual, rank each of the metals from most active to least active. include the H+ ion and Ag in your ranking. Look up…

1. Based on the conductivity of pure water (distilled water), does water exist p

1. Based on the conductivity of pure water (distilled water), does water exist predominantly as ions or as molecules? ____________ Explain why tap water conducted electricity. 2. …

1. Based on the ideal gas law, there is a simple equivalency that exists between

1. Based on the ideal gas law, there is a simple equivalency that exists between the amount of gas and the volume it occupies. At standard temperature and pressure (STP; 273.15 K …

1. Based on the solubility rules, which one of the following compounds should be

1. Based on the solubility rules, which one of the following compounds should be insoluble in water? A) FeCl2 B) AgBr C) MgBr2 D) NaCl E) ZnCl2 2. Using the redox reaction below d…

1. Based on your experimental data, compare the relative abilities of a buffer s

1. Based on your experimental data, compare the relative abilities of a buffer solution and distilled water to resist pH changes upon addition of either acidic or basic solutions.…

1. Basically I am looking for what is it that you goof up and you are out from t

1. Basically I am looking for what is it that you goof up and you are out from the remaining process ? 2. Are elimination rounds a fair way to judge a person ? Anyone can have a b…

1. Bayer Extra Strength aspirin tablets each contain 500 milligrams of acetylsal

1. Bayer Extra Strength aspirin tablets each contain 500 milligrams of acetylsalicylic acid. How many total moles of acetylsalicylic acid are present in a bottle of Bayer Extra St…

1. Because the mass of the flask with water exceeds the amount that can be weigh

1. Because the mass of the flask with water exceeds the amount that can be weighed on the digital balances, the triple-beam-balance is used, which only weighs to ±0.01 g. Why does…