Chemistry concepts and calculations

1.) Use Charles law to complete the following table,(assume pressure and moles o

1.) Use Charles law to complete the following table,(assume pressure and moles of gas to be constant). a.)Complete the first row of the table, Express the answer as two sigificant…

1.) Use a table of Standard Reduction Potentials to predict if a reaction will o

1.) Use a table of Standard Reduction Potentials to predict if a reaction will occur when Mg metal is put into a 1M aqueous H+solution. If a reaction will occur, write a balanced …

1.) Use details of modern atomic theory to explain each of the following experim

1.) Use details of modern atomic theory to explain each of the following experimental observation a.) within a family such as alkali metals, the ionic radius increases as the atom…

1.) Use what you have learned about atomic structure to compare the number of su

1.) Use what you have learned about atomic structure to compare the number of subatomic particles in oxygen and the radioactive isotope of oxygen known as Oxygen -15 ( frequently …

1.) Using enthalpies of formation, calculate the standard change in enthalpy for

1.) Using enthalpies of formation, calculate the standard change in enthalpy for the thermite reaction. The enthalpy of formation of Fe3O4 is 1117 kJ/mol. 8 Al(s) + 3 Fe3O4(s) 4 A…

1.) Watch the animation, and observe the titration process using a standard 0.10

1.) Watch the animation, and observe the titration process using a standard 0.100 M sodium hydroxide solution to titrate 50.0 mL of a 0.100 M hydrochloric acid solution. Identify …

1.) What are the possible values of the principal quantum number n? A.) represen

1.) What are the possible values of the principal quantum number n? A.) represented by the formula: k!, where k is a positive integer B.)all the integer: -3,-2,-1,0,1,2,3, etc. C.…

1.) What are the possible values of the principal quantum number n? A.) represen

1.) What are the possible values of the principal quantum number n? A.) represented by the formula: k!, where k is a positive integer B.)all the integer: -3,-2,-1,0,1,2,3, etc. C.…

1.) What is required to make a buffer solution? A weak acid and the salt of its

1.) What is required to make a buffer solution? A weak acid and the salt of its conjugate base A weak acid and a weak base A strong acid and the salt of its conjugate base A stron…

1.) What is the [H3O+] in a solution that contains 1.63g of HNO3 in 0.550 L of s

1.) What is the [H3O+] in a solution that contains 1.63g of HNO3 in 0.550 L of solution?   2.) A patient with respiratory alkalosis has a blood plasma pH of 7.51. What is the [H3O…

1.) What is the \"molarity\" of a solution prepared by dissolving 1.325 grams of

1.) What is the "molarity" of a solution prepared by dissolving 1.325 grams of sodium carbonate in 250.00mL of water? 2.) What is the "molality" of a solution of 5.25g of urea is …

1.) What is the concentration after the dilution of the following? a. 14.64 mL o

1.)  What is the concentration after the dilution of the following? a.     14.64 mL of 0.446 M K2SO3 is diluted to 56.95 mL. New Molarity? b.     14.64 mL of 0.446 M K2SO3 is dilu…

1.) What is the molar concentration of Ag+(aq) in a 1.00 M solution of Ag(NH3)2

1.) What is the molar concentration of Ag+(aq) in a 1.00 M solution of Ag(NH3)2 with no excess ammonia? Given: Kf= 1.7x10^7 for Ag(NH3)2 2.) What is the equilibrium concentration …

1.) What is the pH of a buffer that consists of 0.43 M CH 3 NH 2 and 0.90 M CH 3

1.) What is the pH of a buffer that consists of 0.43 M CH3NH2 and 0.90 M CH3NH3Cl? (pKb of methylamine (CH3NH2) = 3.35.) (a) 0 mL (b) 10.00 mL (c) 15.00 mL (d) 20.00 mL (e) 25.00 …

1.) What is the potential of an electrochemical cell made from the Zn/Zn 2+ and

1.) What is the potential of an electrochemical cell made from the Zn/Zn2+ and Cu/Cu2+ half cells under standard conditions? E. Cannot be determined because no reference is made t…

1.) What is the value of E o for this half reaction using copper/copper(II) as t

1.) What is the value of Eo for this half reaction using copper/copper(II) as the reference electrode in volts (V)? 2.) What is the balanced chemical reaction for this voltaic cel…

1.) What is the value of each variable after execution? int x = 2; int y = 7; do

1.)What is the value of each variable after execution? int x = 2; int y = 7; double p = 7.0; int z = y / x; double w = p / x; z: w: 2.) What is the output of the following program…

1.) What is the volume percentage of a solution prepared by dissolving 34g of Na

1.) What is the volume percentage of a solution prepared by dissolving 34g of NaOH in enough water to make a final volume of 120 mL? (SHOW WORK) How many mL of a 10% solution can …

1.) What is the volume percentage of a solution prepared by dissolving 34g of Na

1.) What is the volume percentage of a solution prepared by dissolving 34g of NaOH in enough water to make a final volume of 120 mL? (SHOW WORK) How many mL of a 10% solution can …

1.) What mass in grams of solute is needed to prepare 325 mL of 5.30×102 M KMnO4

1.) What mass in grams of solute is needed to prepare 325 mL of 5.30×102 M KMnO4? Express your answer with the appropriate units. 2.) 26.7 mol HCl in 90.0 L of solution. Express y…

1.) What output would be produced by each of the following segments of code? int

1.)What output would be produced by each of the following segments of code? int x = 10; while (x > 0) {             cout << x << endl;             x = x = 3; }     …

1.) What percent recovery could be expected if 1.000 g of caffeine was initially

1.) What percent recovery could be expected if 1.000 g of caffeine was initially dissolved in 120 mL of water and then extracted with a single 80 mL portion of ethyl acetate? 2.) …

1.) What pressure (in atm) is exerted by a column of isopropanol (C3H7OH) 295 m

1.) What pressure (in atm) is exerted by a column of isopropanol (C3H7OH) 295 m high? The density of isopropanol is 0.785 g/cm^3. 2.) Propane (C3H8) burns in oxygen to produce car…

1.) What value(s) of t satisfy the following equation: 8t/3-2/3 2.) Put the foll

1.) What value(s) of t satisfy the following equation: 8t/3-2/3 2.) Put the following into scientific notation a.) 235,000 b.) 0.000337 3.) Take the following out of scientific no…

1.) What value(s) of t satisfy the following equation: 8t/3-2/3 2.) Put the foll

1.) What value(s) of t satisfy the following equation: 8t/3-2/3 2.) Put the following into scientific notation a.) 235,000 b.) 0.000337 3.) Take the following out of scientific no…

1.) When 25.0 g of ethanol and 55.0 g of oxygen combine in the combustion reacti

1.) When 25.0 g of ethanol and 55.0 g of oxygen combine in the combustion reaction: 2C3H7OH (l) + 9 O2 (g) --> 6CO2 (g) + 8H2O (g) a) whats the limiting reactant and what is th…

1.) When aqueous solutions of lead(II) nitrate and potassium iodide are mixed, w

1.) When aqueous solutions of lead(II) nitrate and potassium iodide are mixed, what is the formula for the insoluble solid (precipitate) that forms? a.) KNO3(s) b.) PbI(s) c.) PbI…

1.) Which criteria did you use in this lab activity to determine whether a subst

1.) Which criteria did you use in this lab activity to determine whether a substance was a: a) strong electrolyte?    b) weak electrolyte?   c) nonelectrolyte? 2.) Why is it neces…

1.) Which of the factors affecting solubility explains the observation that silv

1.) Which of the factors affecting solubility explains the observation that silver phosphate (Ag3PO4) is more soluble in pure water than in an aqueous solution of sodium phosphate…

1.) Which of the following combinations represent real orbitals and which are im

1.) Which of the following combinations represent real orbitals and which are impossible? 1s                            [ Select ]                       ["Real", "Impossible"]    …

1.) Which of the following metal fluorides is the least soluble in water. MgF 2

1.) Which of the following metal fluorides is the least soluble in water.                         MgF2               Ksp=6.6x10-9                            CaF2                Ks…

1.) Which of the following substances does not have polar covalent bonds? CO2 ,

1.) Which of the following substances does not have polar covalent bonds? CO2 , CH4 , H2, NH3 2.) According to Bronsted-Lowry definition, which chemical in the following reaction …

1.) Which statement is incorrect ? (a) Energy is the capacity to do work or to t

1.) Which statement is incorrect?             (a)        Energy is the capacity to do work or to transfer heat.             (b)       Kinetic energy is the energy of motion. (c)  …

1.) Which transition in a hydrogen atom would emit the photon of greatest freque

1.) Which transition in a hydrogen atom would emit the photon of greatest frequency? n = 35 to n = 2 n= 6 to n = 2     n = 12 to n = 6 n = 1 to n = 4 n = 2 to n = 9 n = 3 to n = 1…

1.) While carrying out Part A, some of the solid calcium hydroxide is inadverten

1.) While carrying out Part A, some of the solid calcium hydroxide is inadvertently transferred to the beaker and titrated. a.) Will more, less, or the same amount of HCl be used …

1.) While carrying out Part A, some of the solid calcium hydroxide is inadverten

1.) While carrying out Part A, some of the solid calcium hydroxide is inadvertently transferred to the beaker and titrated. a.) Will more, less, or the same amount of HCl be used …

1.) With the temperature held constant, if pressure on a gas is increased, the v

1.) With the temperature held constant, if pressure on a gas is increased, the volume will ______________. If the pressure of a gas is held constant and the temperature is increas…

1.) Write a C++ program that includes two functions named calcavg() and variance

1.) Write a C++ program that includes two functions named calcavg() and variance(). The calcavg() function should calculate and return the average of values stored in an array nam…

1.) Write a balanced moleular equation, an ionic equation, and a net ionic equat

1.) Write a balanced moleular equation, an ionic equation, and a net ionic equation (NOTE THE PHYSICAL STATES OF EACH). A.) Sulphuric acid (aq) + barium nitrate (aq) ==> ? B.) …

1.) Write a java program that reads five integers and determines and prints the

1.) Write a java program that reads five integers and determines and prints the largest and smallest integers in the group? 2.)write a java program that reads two integers determi…

1.) Write a program, BigAndSmall.java, with a loop that lets the user enter a se

1.) Write a program, BigAndSmall.java, with a loop that lets the user enter a series of double numbers. The user should enter 0 to signal the end of the numbers. After the user ha…

1.) Write the balanced chemical equation for the reaction of solid cobalt(III) s

1.) Write the balanced chemical equation for the reaction of solid cobalt(III) sulfide with hydroiodic acid producing aqueous cobalt(III) iodide and hydrosulfuric acid . 2.)Identi…

1.) You are given a sample of an unknown hydrate of CaSO4. The average values of

1.) You are given a sample of an unknown hydrate of CaSO4. The average values of the data collected and recoded in your laboratory notebook where as follows: Mass of empty crucibl…

1.) You carefully weigh out 20.00g of CaCO3 powder and add it to 81.00g of HCl s

1.) You carefully weigh out 20.00g of CaCO3 powder and add it to 81.00g of HCl solution. You notice bubbles as areaction takes place. You then weigh the resulting solution and fin…

1.) You have a solution that contains the following cations: Ag+, K+, and Fe+3.

1.) You have a solution that contains the following cations: Ag+, K+, and Fe+3. You first add a few drops of 1 M HCl to the mixture. a.) What will you observe? Include colors and …

1.) You have been provided 100mL of a 1000ug/ml barium standard. What volume of

1.) You have been provided 100mL of a 1000ug/ml barium standard. What volume of this standard must be diluted to a final volume of 50mL using DI water to produce a 30ug/ml standar…

1.) You have been provided 100mL of a 1000ug/ml barium standard. What volume of

1.) You have been provided 100mL of a 1000ug/ml barium standard. What volume of this standard must be diluted to a final volume of 50mL using DI water to produce a 30ug/ml standar…

1.) You have two buffered solutions. Buffered solution 1 consists of 5.0 M HOAc

1.) You have two buffered solutions. Buffered solution 1 consists of 5.0 M HOAc and 5.0 M NaOAc; buffered solution 2 is made of 0.050 M HOAc and 0.050 M NaOAc. How do the pHs of t…

1.) You have two buffered solutions. Buffered solution 1 consists of 5.0 M HOAc

1.) You have two buffered solutions. Buffered solution 1 consists of 5.0 M HOAc and 5.0 M NaOAc; buffered solution 2 is made of 0.050 M HOAc and 0.050 M NaOAc. How do the pHs of t…

1.) You have water contaminated with phosphates, bacteria and pentachlorophenol.

1.) You have water contaminated with phosphates, bacteria and pentachlorophenol. Which of these water treatment(s) could you use to treat this contaminated water? a. addition of c…