Chemistry concepts and calculations

1) Choose some uses of organic solvents in the home. Check all that apply. Organ

1) Choose some uses of organic solvents in the home. Check all that apply. Organic solvents are used as bleaches. 2) What ingredients are used in liquid dishwashing detergents (fo…

1) Choose the correct molecules, A and B that would be part of the sequence show

1) Choose the correct molecules, A and B that would be part of the sequence shown. The 1H NMR spectrum for the starting material A is provided. Note the formula for A is not provi…

1) Choose the situation below that would result in a ?Hsolution near 0. A) When

1) Christopher examines his plot of potential difference versus time and notices

1) Christopher examines his plot of potential difference versus time and notices that the exponent reads “-2t.” He compares this to Eq. 2 in the lab document to determine the time…

1) Classify each of the following as a mixture, a compound, or an element? table

1) Classify each of the following as a mixture, a compound, or an element? table sugar, propane, bronze, tea, vinegar, dry ice, oxygen, aluminum 2) Select the statements that pert…

1) Classify the following enzymes based on the descriptions of their activities

1) Classify the following enzymes based on the descriptions of their activities (6 pts total) a) glucokinase; adds phosphate group (from ATP) to glucose b) aldolase; splits aldols…

1) Colligative properties depend on the... (choose all that apply) What is the v

1) Colligative properties depend on the... (choose all that apply) What is the vapor pressure in atm of a solution at 25 oC produced by dissolving 56.4 g of dextrose (C6H12O6) in …

1) Combining 0.269 mol of Fe2O3 with excess carbon produced 10.3 g of Fe. Fe2O3

1) Combining 0.269 mol of Fe2O3 with excess carbon produced 10.3 g of Fe. Fe2O3 + 3C ---> 2 Fe + 3CO What is the actual and theoretical yield of iron in moles? What was t…

1) Combustion of 7.21 g of liquid benzene (C6H6) causes a temperature rise of 50

1) Combustion of 7.21 g of liquid benzene (C6H6) causes a temperature rise of 50.3 C in a constant-pressure calorimeter that has a heat capacity of 5.99 kJ/C. What is delta H for …

1) Commercial Aspirin tablets used in this lab contained 325mg of active ingredi

1) Commercial Aspirin tablets used in this lab contained 325mg of active ingredient. Calculate the percent difference of your result vs this true value. % difference = (Measured -…

1) Common house hold cleaners contain aqueous solution of ammonia. a particular

1) Common house hold cleaners contain aqueous solution of ammonia. a particular solution of household ammonia had a pH of 11.90. what is the pOH? what are the concentrations of hy…

1) Complete and balance the following half-reaction: H2SO3( a q )?SO2?4( a q ) (

1) Complete and balance the following half-reaction: H2SO3(aq)?SO2?4(aq) (acidic solution) 2)Complete and balance the following half-reaction: NO?3(aq)?NO(g)(acidic solution) 3)Co…

1) Compound A reacts in a first order process. The rate constant for the reactio

1) Compound A reacts in a first order process. The rate constant for the reaction is determined by experiment to be 0.029s-1. How many seconds will it take for the amount of A to …

1) Compound A reacts in a first order process. The rate constant for the reactio

1) Compound A reacts in a first order process. The rate constant for the reaction is determined by experiment to be 0.029s-1. How many seconds will it take for the amount of A to …

1) Compound Xdissolves in water and needs to be extracted with an organicsolvent

1) Compound Xdissolves in water and needs to be extracted with an organicsolvent. Its solubility in toluene is 0.65 g/mL, in ethanol is 20g/mL and in methylene chloride is 12.5 g/…

1) Compounds composed of two or more charged species that will form ions (charge

1) Compounds composed of two or more charged species that will form ions (charged particles) when dissolved in water are known as: 2) Compounds composed of two or more non-metals …

1) Compute the following values (in Joules) of w, q, , , AS, , and AG for 2.00 m

1) Compute the following values (in Joules) of w, q, , , AS, , and AG for 2.00 mole of an ideal gas that undergoes a reversible isothermal (300K) expansion from P,- 0.500 atm. 5.0…

1) Concentrated acetic acid has a molarity of 17.4. Describe the preparation of

1) Concentrated acetic acid has a molarity of 17.4. Describe the preparation of 400 mL of 0.35 M acetic acid solution. 2) How much 0.400 M acetic acid can be made from 5.00 mL of …

1) Concentrated acetic acid has a molarity of 17.4. Describe the preparation of

1) Concentrated acetic acid has a molarity of 17.4. Describe the preparation of 400 mL of 0.35 M acetic acid solution. 2) How much 0.400 M acetic acid can be made from 5.00 mL of …

1) Concentrated hydrochloric acid is an aqueous solution that is 37.2 % HCl by m

1) Concentrated hydrochloric acid is an aqueous solution that is 37.2 % HCl by mass. The density of the solution is 1.19 g/mL. What mass of HCl is contained in 0.646 L of solution…

1) Consider PbI_2(s) dissolving in water. Calculate Ksp if the maximum solubilit

1) Consider PbI_2(s) dissolving in water. Calculate Ksp if the maximum solubility is 0.00130 M. Answer: 8.79 x 10^-9 2) How many grams of KOH (Ksp= 3.0 x 10^-6) will dissolve in 5…

1) Consider a 100 mol mixture that is 82.0% methane (CH4) and 18.0% ethane (C2H6

1) Consider a 100 mol mixture that is 82.0% methane (CH4) and 18.0% ethane (C2H6). To this mixture is added 26.0% excess air. Of the methane present, 93.20% reacts, 91.80% of whic…

1) Consider a titration of 43.8 mL of 0.124M solution of formic acid [Ka(HCOOH)=

1) Consider a titration of 43.8 mL of 0.124M solution of formic acid [Ka(HCOOH)=1.8x10^-4] with a 0.161 M solution of sodium hydroxide. Calculate (show all work for full marks): a…

1) Consider an SMP system similar to the one shown in Figure 1.6. Illustrate wit

1) Consider an SMP system similar to the one shown in Figure 1.6. Illustrate with an example how data residing in memory could in fact have a different value in each of the local …

1) Consider an one step reaction at equilibrium. What cannot be said about the e

1) Consider an one step reaction at equilibrium. What cannot be said about the equilibrium constant? - It is pressure dependent -It is temperature dependent -It is the ratio of th…

1) Consider the combustion reaction of methane, CH4: CH4(g) + 2O2 (g) ! CO2(g) +

1) Consider the combustion reaction of methane, CH4: CH4(g) + 2O2 (g) ! CO2(g) + 2 H2O(l) Suppose 8.00 g of CH4 is reacting with 8.00 g of oxygen. How much (in gram) CO2 and H2O a…

1) Consider the dehydration reaction of 4-methylcyclohexanol. Consider a stabili

1) Consider the dehydration reaction of 4-methylcyclohexanol. Consider a stability of relevant conformations required for E2 elimination and predict which stereoisomer should unde…

1) Consider the equilibrium: HNO 3 (aq) + H 2 O(l) ? H 3 O + (aq) + NO 2 - (aq)

1) Consider the equilibrium: HNO3(aq) + H2O(l) ? H3O+(aq) + NO2-(aq) Will the following changes cause the equilibrium to shift to the left or right or will there be no effect? a. …

1) Consider the following MIPS program: ADDI R1, R0, #1 SW R1, 2000 (R0) LOOP: L

1) Consider the following MIPS program: ADDI R1, R0, #1 SW R1, 2000 (R0) LOOP: LW R1, 2000 (R0) MULT R2, R1, #4 ADDI R3,R2, #5000 LW R4, 0 (R3) LW R5, 1500 (R0) ADD R6, R4, R5 LW …

1) Consider the following equilibrium: Fe3+(aq) + SCN-(aq) FeSCN2+(aq) Initial c

1) Consider the following equilibrium: Fe3+(aq) + SCN-(aq) FeSCN2+(aq) Initial concentrations: [Fe3+] = 0.590; [SCN-] = 1.239; [FeSCN2+] = 0 The equilibrium concentration of [FeSC…

1) Consider the following function prototype. void funcTemp(int x, float y = 7.5

1) Consider the following function prototype. void funcTemp(int x, float y = 7.5, char ch = '*'); Which of the folloiwng statement in C++ is valid? (i) funcTemp(6, '#'); (ii) func…

1) Consider the following gas-phase equilibria at 800.0 K: c) Consider a mixture

1) Consider the following gas-phase equilibria at 800.0 K: c) Consider a mixture of air, which is essentially 80.0 mole percent N2(g) and 20.0 mole percent O2(g), and a trace amou…

1) Consider the following questions a) Light takes 8 minutes and 19 seconds to r

1) Consider the following questions a) Light takes 8 minutes and 19 seconds to reach from the sun to the earth. The speed of light is 3.0x10^8 m/s. How far (in meters) away is the…

1) Consider the following reaction at equilibrium. What effect will reducing the

1) Consider the following reaction at equilibrium. What effect will reducing the volume of the reaction mixture have on the system? Xe(g) + 2 F2(g) ? XeF4(g) SO2(g) + NO2(g) ? SO3…

1) Consider the following reaction where K c = 7.00×10 -5 at 673 K. NH 4 I (s) -

1) Consider the following reaction where Kc = 7.00×10-5 at 673 K. NH4I(s) --> NH3(g) + HI(g) A reaction mixture was found to contain 5.62×10-2 moles of NH4I(s), 1.12×10-2 moles…

1) Consider the following reaction: 2NO 2 Cl(g) ? 2NO 2 (g) +Cl 2 (g) The follow

1) Consider the following reaction: 2NO2Cl(g) ? 2NO2(g) +Cl2(g) The following mechanism has been proposed: What is Cl(g) in this reaction mechanism? transition state complex activ…

1) Consider the following reaction: C O ( g ) + 2 H 2 ( g ) ? C H 3 O H ( g ) An

1) Consider the following reaction: CO(g)+2H2(g)?CH3OH(g) An equilibrium mixture of this reaction at a certain temperature was found to have [CO]= 0.110M , [H2]= 0.116M , and [CH3…

1) Consider the following reaction: CO( g )+2H2( g )CH3OH( g ) A reaction mixtur

1) Consider the following reaction: CO(g)+2H2(g)CH3OH(g) A reaction mixture in a 5.17 L flask at a certain temperature initially contains 26.5 g CO and 2.36 g H2. At equilibrium, …