Chemistry concepts and calculations

What is the effect on retention time (longer, shorter, unchanged) of the followi

What is the effect on retention time (longer, shorter, unchanged) of the following? Septum coring Loss of stationary phase by column bleeding Operating column at higher temperatur…

What is the effective pH range of a buffer? For this experiment, you will be cre

What is the effective pH range of a buffer? For this experiment, you will be creating an acetate buffer, which is acidic. Look up the pKa of acetic acid, and be sure to cite where…

What is the electron pair geometry if you have 3 electron groups around the cent

What is the electron pair geometry if you have 3 electron groups around the center atom? linear trigonal planar tetrahedral trigonal bipyramidal Which molecule listed below has a …

What is the electron pair geometry of ICl5? ( a) trigonal bipyramidal (b) octahe

What is the electron pair geometry of ICl5? (a) trigonal bipyramidal (b) octahedral (c) tetrahedral (d) square planar How many resonance structures for the SO2 3 ion are there wit…

What is the electron pair geometry of the following? 1) I3? 2) HCN 3) ICl2+ Solu

What is the electron pair geometry of the following? 1) I3? 2) HCN 3) ICl2+

What is the electron pair geometry of the following? 1) I3? 2) HCN 3) ICl2+ Solu

What is the electron pair geometry of the following? 1) I3? 2) HCN 3) ICl2+

What is the electron pair geometry of the following? LinearTrigonal planarTetrah

What is the electron pair geometry of the following? LinearTrigonal planarTetrahedralTrigonal bipyramidalOctahedral ClF5 LinearTrigonal planarTetrahedralTrigonal bipyramidalOctahe…

What is the element of these two riddles? I can be hammered and I cry when I am

What is the element of these two riddles? I can be hammered and I cry when I am bent I do not rust,corrode or react in any way I help join two metals together and manufacture othe…

What is the element oxidized, reduced, oxidizing agent, reducing agent and numbe

What is the element oxidized, reduced, oxidizing agent, reducing agent and number of electrons transferred of the following I2 + 2Na2S2O3 > Na2S4O6 + 2NaI 3Ag2S + 8HNO3 > 6A…

What is the elemental composition of Para Nitrotoulene? My boiling point is 53 C

What is the elemental composition of Para Nitrotoulene? My boiling point is 53 Celsius, I do not know the density Plesse help!!!! I have no idea what to do. I have provided all of…

What is the empirical formula for the compounds? a. A compound with 92.2% carbon

What is the empirical formula for the compounds? a. A compound with 92.2% carbon and hydrogen b. A compound with 65.4% carbon, 29.1 % oxygen and hydrogen c. A compound with 83.6% …

What is the empirical formula of a hydrocarbon if complete combustion or 6.100 m

What is the empirical formula of a hydrocarbon if complete combustion or 6.100 mg of the hydrocarbon produced 20.102 mg of CO2and 5.486 mg of H2O? Be sure to write C first in the …

What is the energy, in joules, of one mole of photons associated with radiation

What is the energy, in joules, of one mole of photons associated with radiation that has a frequency of 6.336 times 1013 2.528 times 108 J 3.882 times 1014 J 3.955 times 10 - 7 J …

What is the energy-carrying product? What are the other two products? oxidized c

What is the energy-carrying product? What are the other two products? oxidized coenzymes ATP ADP reduced coenzymes H_2O What are the two primary functions of the electron-transpor…

What is the enthalpy change for producing 1.00 L of acetic acid (d = 1.044 g/mL)

What is the enthalpy change for producing 1.00 L of acetic acid (d = 1.044 g/mL) by this reaction? Assume you mix 100.0 mL of 0 200 M CsOH with 50.0 mL of 0.400 M HCl in a coffee-…

What is the enthalpy for the reaction reversed: 2NO2--- 2NO + O2 Reaction revers

What is the enthalpy for the reaction reversed: 2NO2--- 2NO + O2 Reaction reversed: 2NO + O2 --2NO2. Express your answer numerically in kilojoules per mole: (kJ / mol)

What is the enthalpy for the reaction reversed: 2NO2--- 2NO + O2 Reaction revers

What is the enthalpy for the reaction reversed: 2NO2--- 2NO + O2 Reaction reversed: 2NO + O2 --2NO2. Express your answer numerically in kilojoules per mole: (kJ / mol)

What is the enthalpy of dissolution of KOH? The molar mass of KOH is 56.11g/mol,

What is the enthalpy of dissolution of KOH? The molar mass of KOH is 56.11g/mol, the specific heat of the solution is 4.184J/GC, and the calorimeter constant is 22.45 J/C Mass of …

What is the enthalpy of pure, liquid aluminum at 1000 K? (Use pure, solid alumin

What is the enthalpy of pure, liquid aluminum at 1000 K? (Use pure, solid aluminum at 298 K as the reference state.) An electric resistance furnace is used to melt pure aluminum a…

What is the entropy change for the freezing of one mole of water at 0 degreeC? T

What is the entropy change for the freezing of one mole of water at 0 degreeC? The heat of fusion is 333.5 J g^1. (at wts:H=1.00, 0=18) A liter vessel containing 0.233 mol of N_2 …

What is the equilibrium concentration of O_2 in the following reaction if the eq

What is the equilibrium concentration of O_2 in the following reaction if the equilibrium concentrations of N_2 and NO are 24 M and 011 M, respectively. N_2(g) + O_2(g) 2NO(g), K_…

What is the equilibrium constant (K) at 25 degree C for the following cell react

What is the equilibrium constant (K) at 25 degree C for the following cell reaction? Zn(s) + cr^2+(aq) rightarrow cr(s) + zn^2+ (aq) E = 0.89 V A) 3.7 times 10^12 B) 1.8 times 10^…

What is the equilibrium constant expression for the K sp of Ca 3 (PO 4 ) 2 ? Ans

What is the equilibrium constant expression for the Ksp of Ca3(PO4)2? Answer Ksp = [Ca2+]3[PO43-]2 Ksp = {[Ca2+]3[PO43-]2}/[Ca3PO4] Ksp = {[Ca2+]3[PO43-]2}/{[Ca3PO4][H2O]} Ksp = 1…

What is the equilibrium constant expression for the reaction? C(s) + 2H_2(g) CH_

What is the equilibrium constant expression for the reaction? C(s) + 2H_2(g) CH_4(g) (A) K =[CH_4/CIH_2]^2 (B) K =[CH_4]/[H_2]^2 (C) K =[CIH_2]^2/[CH_4] (D) K =[H_2]^2/[CH_4] 22. …

What is the equilibrium constant, Kc, if [A] = 0.19 M, [B] = 0.952 M, and [C] =

What is the equilibrium constant, Kc, if [A] = 0.19 M, [B] = 0.952 M, and [C] = 0.70 M 2 A ReverseEquilibrium 2 B + C 18 3.3 3.5 7.0 Which change will increase the quantity of pro…

What is the equilibrium pH of the solution? How much of sodium hydroxide (NaOH)

What is the equilibrium pH of the solution? How much of sodium hydroxide (NaOH) should be added to the solution to adjust the solution pH as 7.0? How much of sodium hydroxide (NaO…

What is the equivalence point?? Trial # Volume of NaOH used(mL) pH 1 0 3.19 2 1.

What is the equivalence point?? Trial # Volume of NaOH used(mL) pH 1 0 3.19 2 1.5 3.69 3 2.5 3.85 4 3.5 3.98 5 4.5 4.15 6 5.5 4.29 7 7 4.48 8 9.5 4.7 9 12 4.9 10 13.5 4.98 11 15 5…

What is the evidence that your product is a single geometric dibenzalacetone iso

What is the evidence that your product is a single geometric dibenzalacetone isomer and not a mixture of isomers? Can the evidence be from an IR spectrum or the melting point or b…

What is the excess reactant for the following reaction given we have 3.4 moles o

What is the excess reactant for the following reaction given we have 3.4 moles of ca(No_3) _2 and 2.4 moles of Li_3 PO_4? Reaction: 3Ca(NO_3) _2 + 2Li_3 PO_4 rightarrow 6LiNO_3 + …

What is the expected cell voltage for the copper concentration cell that contain

What is the expected cell voltage for the copper concentration cell that contain 1.0 M Cu(NO_3)_2 in half-cell and 0.0010 M Cu(NO_3)_2 in the other half-cell? (Show the calculatio…

What is the expected following point of a 0.5 as solution of Ca2SO4 in water? Kg

What is the expected following point of a 0.5 as solution of Ca2SO4 in water? Kg foe water is 1.36 degree C? Nitrogen dioxide decomposes to nitric oxide and oxygen via the reactio…

What is the expected major product for the following reaction? What reagents are

What is the expected major product for the following reaction? What reagents are needed to accomplish the following transformation? H_2O/H^+ H_2O/Peroxide OH^- BH_3THF 1.BH_#THF, …

What is the expected major product for the following reaction? What reagents are

What is the expected major product for the following reaction? What reagents are needed to accomplish the following transformation? H_2O/H^+ H_2O?Peroxide OH^- BH_3THF 1. BH_3THF,…

What is the expected solubility, in grams per 100 mL, of magnesium hydroxide, Mg

What is the expected solubility, in grams per 100 mL, of magnesium hydroxide, Mg(OH)2 in water?

What is the expected solubility, in grams per 100 mL, of magnesium hydroxide, Mg

What is the expected solubility, in grams per 100 mL, of magnesium hydroxide, Mg(OH)2 in water?

What is the experimental yield (in g of precipitate) when 16.6 mL of a 0.5 M sol

What is the experimental yield (in g of precipitate) when 16.6 mL of a 0.5 M solution of sodium chloride is combined with 17.2 mL of a 0.567 M solution of silver nitrate at a 89.8…

What is the expression for K_c for the following equilibrium? CaCO_3(s) righthar

What is the expression for K_c for the following equilibrium? CaCO_3(s) rightharpoonleftharpoon CaO(s) + CO_2(g) [CO2] [CaCO_3]/[CaO][CO_2] [CaO][CO_2]/[CaCO_3] [CaO][CO_2] 1/[CO_…

What is the final % w/w strength of a hydrocortisone ointment if you mix 60 gram

What is the final % w/w strength of a hydrocortisone ointment if you mix 60 grams of 1% hydrocortisone ointment with 80 grams of 2.5% hydrocortisone ointment? 2.2 % w/w 1.85% w/w …

What is the final concentration if 25.0 mL of 2.50 M glucose solution is diluted

What is the final concentration if 25.0 mL of 2.50 M glucose solution is diluted to a volume of 550.0 mL ? Copper reacts with dilute nitric acid according to the following balance…

What is the final concentration if 55.0 mL of 2.50 M glucose solution is diluted

What is the final concentration if 55.0 mL of 2.50 M glucose solution is diluted to a volume of 500.0 mL? (ii) Copper reacts with diluted nitric acid according to the following ba…

What is the final concentration of D at equilibrium if the initial concentration

What is the final concentration of D at equilibrium if the initial concentrations are [A] = 1.00 M and [B] = 2.00 M ?The reversible chemical reaction A+BC+D has the following equi…

What is the final concentration of an iron III nitrate solution that is prepared

What is the final concentration of an iron III nitrate solution that is prepared by diluting 4.75 mL of 0.00300 M Fe(NO_3)_3 solution to a final volume of 10.00mL with deionized w…

What is the final pH if .2 mol HCL is added to .5L of a buffer solution formulat

What is the final pH if .2 mol HCL is added to .5L of a buffer solution formulated using .28 M NH3 and .22 M NH4CL? Assume there is no change in volume upon addition of HCL. Kb(NH…

What is the final pH if .2 mol HCL is added to .5L of a buffer solution formulat

What is the final pH if .2 mol HCL is added to .5L of a buffer solution formulated using .28 M NH3 and .22 M NH4CL? Assume there is no change in volume upon addition of HCL. Kb(NH…

What is the final pH when 42.1 mL of 3.2 M NaOH is added to 1.00 L of 0.150 M HF

What is the final pH when 42.1 mL of 3.2 M NaOH is added to 1.00 L of 0.150 M HF (K_a = 3.5 times 10^-4) Why is the molar solubility of silver chloride lower in an aqueous solutio…

What is the final percentage strength (w/w) of a product made by combining 30 gr

What is the final percentage strength (w/w) of a product made by combining 30 grams of a 50% powder with 20 grams of a 10% powder and 50 grams of lactose (a diluent with 0% active…

What is the final product of the following reaction sequence? When a high energy

What is the final product of the following reaction sequence? When a high energy electron impacts molecule M in the ionization chamber, what type of species is initially produced?…

What is the final solution molarity when 75mL of isopropyl alcohol (C3H8O) (dens

What is the final solution molarity when 75mL of isopropyl alcohol (C3H8O) (density of.785g/mol) is mixed with water to prepare a final solution volume of 1.0 Liters? I got 1.05 M…

What is the final solution molarity when 75mL of isopropyl alcohol (C3H8O) (dens

What is the final solution molarity when 75mL of isopropyl alcohol (C3H8O) (density of.785g/mol) is mixed with water to prepare a final solution volume of 1.0 Liters? I got 1.05 M…

What is the final state of the system after 71. 26 kJ of energy is removed from

What is the final state of the system after 71. 26 kJ of energy is removed from 150.0 g of water at 1 atm. The water has an initial temperature of 20.0degreeC. (A) An equilibrium …