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Chemistry Questions
please answer for a thumbs up! 1. Given the standard enthalpy changes for the following two...
The harmonic frequency (ωe= ħ ω/(hc)) for the HCl (g) molecule is 2991cm-1. a. Find the...
Determine the chemical formula and the chemical name of the ionic compound formed from the ions...
Convert the following measurement. 2.5 * 10^-7 kg*m^2/ s2 = ? g*cm2/s2
Consider the following reaction and its equilibrium constant: SO2(g) + NO2(8) - SO3(g) + NO(g) Kc=0.33...
ith respect to chemical versus nuclear properties of different isotopes of the same element, which of...
how much potassium bromide would you need to dissolve in 100. mL of water to prepare...
Elements which are most likely to form an ionic compound if they are allowed to react...
If the ΔG°′ for the conversion of glucose-6-phosphate to glucose-1-phosphate is 7.5 kJ/mol at 25°C, what...
A cell is set up with a nickel electrode and a nickel sulfate solution in the...
For the following binary compounds which would have the most acidic hydrogen? A) SH2 B) NH3...
For a 1st order reaction the logarithm of concentration is linear to time. The linear equation...
Please help! 1. You have analysed a suspect tablet and found it to contain strychnine. The...
Biphenyl, C 12 H 10 , is a nonvolatile, nonionizing solute that is soluble in benzene,...
Sometimes two alcohol peaks appear in the GC, even though the experiment began with just one...
Select the pair of substances in which the one with the lower boiling point is listed...
3) Enzyme kinetics are determined under initial rate conditions, wherein the initial substrate concentrations changes very...
What is the [H+] of a solution that has a pOH of 12 a. 1.0x10-12 M...
Explain the difference in physical properties of the polyesters- nylon, phthalic anhydride + ethylen glycol, and...
A solution is made by dissolving 26.3 g of chromium(III) sulfate, Cr2(SO4)3, in enough water to...
A certain element forms an ion with 10 electrons and a charge of +2. Identify the...
Below are the paired reduction reactions for chemolithotrophic denitrification: these organisms are using nitrate as an...
The following ionic compounds are dissolved in water. For each of the substances below, identify the...
A solution containing a mixture of metal cations was treated as outlined. Dilute HClHCl was added...
Calculate the kinetic energy, in joules, of the electrons ejected from the surface of cesium by...
What is the pH of a 0.44 M solution of LiF? The pKa for HF =...
Calculate charge of glutamate at ph 7.5
The protein apotransferrin binds two Fe(III) ions for cell transport. A 5.00 mL solution of apotransferrin...
Be sure to answer all parts. Calculate the equilibrium constant for the following reaction: (Ka of...
1.) A system absorbs 1.56E+2 kJ of heat and the surroundings do 1.107E+2 kJ of work...
1. compare the naming rules for carboxylic acids, carboxylic salts and esters. 2. how does the...
How many molecules of hydrogen gas (H2) are inside the bulb? (It's open) Atmospheric pressure is...
A 1 milliliter (mL) equals to 1 cubic centimeter (cm3 or cc). How many fluid ounces...
Part A) The reactant concentration in a zero-order reaction was 7.00×10−2 M after 200 s and...
Phosphorus pentachloride decomposes according to the chemical equation: PCl5(g)==>PCl3(g) + Cl(g) Kc = 1.80 at 250C...
The salt of which of the following cations would exhibit paramagnetism at the GREATEST extent? a....
Which of the following salts gives a basic aqueous solution? a) KBr b) NaCN c) NH4ClO4...
The acetic acid solution is 1.49 x 10 -3 ± 4 x 10 -5 M. Report...
Calculate all the concentrations in equilibrium in a 0.4M solution of magnesium hydroxide
A galvanic cell is powered by the following redox reaction: 5Cl2 (g) + I2(s) + 6H2O(l)...
Conjugated pi-bonds can be modeled as a particle-in-the-box. In this case, the particle is an electron...
1. Answer the following questions in detail. a) Given 25mL of 0.10 M HCl and 25...
Picolinic acid is a diprotic acid with ionization constants ?a1=9.80×10−2 and ?a2=4.10×10−6 . Calculate the pH...
What surface area would be required for the DSSC (Dye-Sensitized Solar Cell) to generate 1 watt...
Given a protein amino acid sequence (written out, 1 letter abbreviation, about 700 amino acids), how...
What amount of heat would be required to raise the temperature of 75.00g of tungsten from...
For uv-vis would a different choice of absorption wavelength change a result? How? Give an example
Consider a 6×10−2 M solution of the weak base methylamine. The pKb of methylamine is 3.34 You can...
Nitric oxide, NO, is formed in the air by lightning during thunderstorms. It has been estimated...
A) A reaction has an equilibrium constant of Kp=0.280 at 44 ∘C. Find ΔG∘rxn for the...
2CrO42- + 6F-+ 8 H2O3F2 + 2Cr(OH)3+ 10 OH- In the above redox reaction, use oxidation...
1. A key step in the extraction of iron from its ore is FeO(s) + CO(g)...
Which would have the highest root mean square speed? Explain a) Ne at 300K b) Ne...
Part A) The activation energy of a certain reaction is 33.9 kJ/mol . At 20 ∘...
How long will it take for the radioisotope Rn-222 to decay to 54.2 g if the...
The pH of a solution prepared by dissolving 0.950 mol of acid in 2.00 L of...
Consider the substitution reaction that takes place when (R)-3-bromo-3-methylhexane is treated with methanol. What of the...
Assume permanganate is injected into groundwater to treat TCE. Is this treatment of TCE considered an...
Which process is most likely to be spontaneous at standard temp and pressure? a. W(s) +...
In a fictitious world the Thomson cathode ray experiments found the electron charge to mass ratio...
Predict the effects of (a) increasing the dielectric constant of a solvent, (b) increasing the ionic...
A 5.5 x 10^-3 lb sample of French fries is placed in a calorimeter with 500.0...
Describe an occurrence or application of an electrolytic cell/process not discussed in this lab or the...
A sample of neon initially has a volume of 3.72 LL at 17 ∘C∘C . What...
CO2 + 2NH3 = NH2C(O)NH2 Assume that for the chemical reaction A+2NH3→ B above ∆H'°= -...
What will be the new value of the pH if 20.0 g of solid sodium benzoate...
Which type of medium would be the best choice when shipping a sample of bacteria from...
How would you make 1L of 0.1N NaOH solution from an 18N stock solution?
Compare and contrast the techniques (Evaporation, Filtration, Crystallization). When is each technique appropriate? What are the...
Consider the titration of a 25.0 mL sample of 0.125 M HCN (Ka= 6.17x10^-10) with a...
The acid dissociation constant, Ka, is 1x10-5 for a monoprotic mystery acid, HMyst. What is the...
What makes that iron-sulfur (Fe-S) cluster so prevalent in living organisms? Why was the “great oxidation”...
To make beer, yeast converts glucose (C6H12O6) into ethanol (� = 0.789 g/mL) in a process...
Of three resonance forms for the nitrate ion, NO3–, below. Use the tables below to find...
Enter a balanced equation for the reaction between hydroiodic acid and lithium hydrosulfite.
In a series of equilibrium, haber and their collaborations mixed hydrogen and nitrogen in a vessel,...
Phosphate buffer (pH range 5.8 – 8.0). Assume you have prepared two separate stock solutions: Solution...
4. What will you observe if you add CuSO4(aq) to a solution containing glucose? 5. If...
When ranking the strength of acids in aqueous solution, water is acting as: A. a base...
A voltaic cell is constructed that uses the following reaction and operates at 298 K: Zn(s)+Ni2+(aq)→Zn2+(aq)+Ni(s)....
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