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a) A metal ion buffer was prepared from 0.022 M ML and 0.026 M L, where...
What is the pH of the a buffer solution containing 0.10 moles of acetic acid and...
A 0.160-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What...
An unknown substance has a mass of 28.1 g. The temperature of the substance increases by...
Use the second law of thermodynamics to explain briefly what happens, in terms of the entropy...
A voltaic cell is constructed with a compartment of Aluminum strip in a solution of Al(NO3)3...
Please use an ice table and lable which answer is Ka for NH4+ and pka NH4+...
1) A quantum harmonic oscillator with frequency ωcontains 41 electrons. What is the energy of the...
What is the electron configuration of He, Ne, Ar, Kr, Xe, Rn
What is the difference between a drug and an organic compound
If the endpoint is reached when 50.00 mL of a tap water sample is titrated with...
3dz^2, what is N,L and m(L) and how to draw it. please explain in detail
solution [NH4+], M NH3], M ΔpH on adding H+ pH on adding H+ Initial pH pH...
a)For a photon of 9.75 cm-1, what is the corresponding frequency in GHz? b)A lamp emits...
Hot water added to cold water spontaneously mixes so that all of the water has the...
Equilibrium constants at 25 ∘C are listed in the table below. Substance Kc Value of Kc...
A student was titrating 25.00 mL of a monoprotic basic solution with a monoprotic acidic solution...
describe one example of an experiment (and give one equation) that shows that electromagnetic radiation is...
An object has a mass of 1.67 x 10-27kg and a kinetic energy of 2.323 x...
If one wanted to unbuffer a buffer solution of 20mL 2.00M acetic acid and 20mL 0.500M...
A student titrated a 25.00 mL sample of a solution containing an unknown weak, diprotic acid...
3. Find the minimum pH values for a solution that is 0.100 M in Fe2+ and...
2. Calculate the molar solubility of the following: a. AgCl added to pure water b. AgCl...
to extract a solution contains 2-naphthol, and benzoic acid. what happens if NaOH is added first,...
What effect would changing the developing solvent from 4:6 hexanes:ethyl acetate to 8:2 hexanes:ethyl acetate have...
Calculate the molarity of the NaOH solution if 220 mL of NaOH was added to 430...
Light with a wavelength of 96.94 x 10^ 9 m is required to excite an electron...
A solution is made by mixing 400 mL of 0.156 M KOH with 0.53 L of...
A 43.32mL solution of 0.1456M Pb(NO3)2 solution is added to 44.34mL 0.289M KI solution. What will...
The balanced equation for the combustion of methanol is 2CH3OH(l)+3O2(g)→2CO2(g)+4H2O(g). Calculate ΔH∘rxn, ΔS∘rxn, and ΔG∘rxn at 25...
an aqueous solution of glucose boils at 100.2c what is the number of glucose moleculein solution...
Calculated values of n and formulas of Ni2+ complexes present in solution. Z+nL <-> ZLn Z=Ni2+...
What is the pH of a 0.29 M solution of methylammonium chloride, CH3NH3Cl? What is the...
Find the concentration of I– in 0.050 M AgNO3 saturated with AgI. Include activity coefficients in...
For each of the following redox reactions in the, identify the oxidizing agent and the reducing...
Based on the thermodynamic properties provided for water, determine the energy change when the temperature of...
At 25 °C only 0.0200 mol of the generic salt AB is soluble in 1.00 L...
The Ka constant of a weak acid always deals with the weak acid dissociating in water...
During methane liquefaction, about 1000 kg of methane are stored at a pressure of 10 Mpa...
At sea-level and at 30.0 °C, the solubility of O2 in water is 7.50 mg/L. Consider...
2. Buffer capacity refers to the amount of acid or base a buffer can “absorb” without...
I have a mixture consisting of 0.180 M nitrous acid, and 0.150 M sodium nitrite. NOTE:...
The Kc for the following reaction is 5.62 at 305°C. A2(g) + B2(g) 2 C(g) If...
1. You need to prepare 1.000 L of 0.50 M phosphate buffer, pH=6.21. Use the Henderson-Hasselbalch...
1. You need to prepare 1.000 L of 0.50 M phosphate buffer, pH=6.21. Use the Henderson-Hasselbalch...
Preparation of tetraethylammonium tetrachloromanganate (II) [(C2H5)4N]2[MnCl4] Dissolved manganese(II) chloride tetrahydrate 2.0 g in 10 mL hot...
a) The stratosphere extends to 50 km above the Earth’s surface, where P = 0.085 kPa...
A gas of CH 4 and He is contained in a tube at 101.32 kPa pressure...
So this is a practice problem for Biochem 1 and will be a huge part of...
The Ka value for methyl red, a common pH indicator, is 5.0 x 10-6. HMR is...
Explain van der Waals forces in your own words. As part of your explanation, explain the...
Wet air containing 4.0 mole% water vapor at 76°F and 14.8 psia is passed through a...
identify the following processes as spontaneous or nonspontaneous, and explain your choice. a. A photovoltaic cell...
Calculate the pH of the following solutions. a.) 0.33 M KHSO4 B.)0.25 M HCN C.) 0.48...
４０．2.20 L of a buffer solution that is 0.190 M in benzoic acid, C6H5COOH, and 0.340...
Determine the volume of 15.0 M sulfuric acid needed to react with 45.0 g of aluminum...
The oxidation number of Cr changes during the reaction from ________ to ___________. Because of this...
３９．A buffer solution is 1.20 M in NH3 and 1.00 M in NH4Cl. If 0.190 moles...
A 0.4571 g sample of a chloride containing unknown was titrated with 0.1013 M AgNO3 using...
1. Calculate the free energy of transport (Gt) for the movement of sodium ions (Na+ )...
Given that the vapor pressure of water is 17.54 Torr at 20 °C, calculate the vapor-pressure...
What is the molality (m) of a 36.45% (by weight) solution of HCl in water? A....
A volume of 18.0 L contains a mixture of 0.250 mole N2 , 0.250 mole O2...
A 0.0202M solution of chloroacetic acid is 24.1% ionized at 25°C calculate the Ka for this...
Calculate the number of moles of magnesium, chlorine, and oxygen atoms in 8.20 moles of magnesium...
6.) A 50.00 mL sample of 0.1000 M pyridine is titrated with 0.2000 M hydrochloric acid....
With the aid of a Jablonski Diagram, describe why an emissive process is always observed at...
DDT is an insecticide banned by the U. S. government because of its hazard to fish...
. 6.25 g of gold and 6.25 g of chlorine are sealed in a container and...
[Ni(NH3)m(H2O)p]^2+ + mHCl ->mCl- + pH2O + Ni^2+ + mNH4^+ excess HCl + OH- -> H2O...
What is the molarity of 150mL of a acid solution containing 4.9 g of H2SO4
One milliliter (1.00 mL) of acid taken from a lead storage battery is pipetted into a...
match the following: a- the stationary phase is a solid packed into a thin column and...
USE THE dimensional analysis method to solve: In Brazil, vehicles are fueled almost entirely by ethanol...
In a laboratory experiment 24.239 g of methane is burned in air containing O2 to form...
How many minutes will it take to plate out 4.50 g of Cu from a solution...
Propose a structure for a compound with molecular formula C8H14O3 that fits the following spectroschopic data:...
Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three...
Container A holds 767 mL of ideal gas at 2.80 atm. Container B holds 129 mL...
1. Calculate the [H3O+] of a 1.93 M HBrO solution at 25 ºC. please show work.
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