Q: What is the pH of a 0.0758 M solution of NH4Cl? Kb for NH3 = 1.8 × 10−5
A: NH4Cl is salt of strong acid and weak base
Q: Which of the following conditions can decrease the reaction rate? Select one a. When the reactants e...
A: Rate of reaction depends on 1) conc. Of reactant 2) Temperature 3) catalyst 4) size of particle
Q: Are the two substituents equatorial or axial, cis or trans? Select all that apply. © GMU 2020 trans ...
A: We have to predict the position of substituents.
Q: Calculate the following points on the titration curve for the reaction of 20.00 mL of 0.1075 M Pb4+ ...
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Q: -rays consist of fast-moving electrons. A) Beta B) Gamma c) Alpha D None of these E
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Q: I Review | CoI MISSED THIS? Watch KCV 10.7, IWE 10.9; Read Section 10.7. You can click on the Review...
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Q: Please use the values in the resources listed below instead of the textbook values. The following re...
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Q: In nature, the noble gases exist as A the sulfides B) the gaseous fluorides c) monatomic gaseous ato...
A: There are 6 naturally occurring Noble gas elements: He, Ne, Ar, Kr, Xe, Rn
Q: A solution has [H+] = 3.5x10-4 M. The [OH-] in the solution is what?
A: • The values provided in the question are:- i) Hydrogen ion concentration of a solution, [H+] = 3...
Q: Consider the reaction CaCl2 (s) = Ca2+ (g) + 2Cl- (aq) (Ksp = 5.5 x 10-6) 1. What is the solubility...
A: CaCl2 (s) = Ca2+ (g) + 2Cl- Solubility (mol/L): ...
Q: Now examine the ionization of O and N. How many electrons are in the 2p subshell of the ions they fo...
A: We will write electronic configuration and then ionize then to answer the question.
Q: The pH of dissolving 1.48 g of propanoic acid (CH3CH2COOH, Ka = 1.3X10-5) in 200 mL H20 is %3D 4.82 ...
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Q: what is the structural formula and repeating unit for PhenylalanineHistidine?
A: Structural formula
Q: Give the theoretical rate equation for the forward direction. Non-numerical, all are gases in a clos...
A: The balanced reaction given is, => C2H6 + 2 Cl2 → C2H4Cl2 + 2 HCl
Q: A typical triple bond A consists of one o bond and two t bonds consists of two o bonds and one t bon...
A: To solve this problem we have to know about triple bond .
Q: Compound 4 has two functional groups and it will formed an oily yellow liquid when it reacts with ni...
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Q: A buffer solution containing only 0,050 mol of CH3NH2 and 0.060 mol of CH3NH3CI has a total volume o...
A: Using Henderson hasselbalch equation we can find the pH of buffer solution. pOH = pKb + log([salt] /...
Q: Ethanol (C2H6O) is a common additive to gasoline that aids incomplete combustion. If 32.37 g of etha...
A: Reaction: C2H6O + 3 O2 → 2 CO2 + 3 H2O 46.07 g 88.02 g Molar mass of ethanol ...
Q: Calculate DS° for the reaction 4Cr(s) + 302(g) ® 2Cr2O3(s).
A:
Q: Determine the concentrations of the following ionic species present in a 0.350 M solution of Na2SO3....
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Q: Silane (SIH4), phosphine (PH3), and nitrous oxide (N20) melt at -185°C, -133°C, and -91°C, respectiv...
A: To answer this question , we would check the relation between melting point , polar nature and inter...
Q: The density of liquid mercury is 13.5 g/cm3. What mass of mercury will fill a 0.500 L container?
A: Given Density = 13.5 g/cm3 Volume = 0.500 L
Q: Which equation correctly represents the first ionization of calcium? A) Ca+ (g) + e- → Ca (g) B Ca- ...
A: We have to predict correct equation for ionization of Ca atom.
Q: Convert the following pH value into a hydroxide ion concentration: 11.21
A: Given pH is 11.21
Q: Give the theoretical forward rate equation when all are gases except water 4 PH3 + 2 H2 + 9 O2 D 2 P...
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Q: Copper is often added to paint for ocean-going ships and boats to discourage the growth of marine or...
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Q: Calculate the volume in liters of a 65.5 g/dL potassium iodide solution that contains 318. g of pota...
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Q: Identify the limiting reactant. Clb (g) + 3F2 (g) → 2CIF3 (g) Express your answer as a chemical form...
A: The balanced chemical reaction is Cl2(g) + 3F2(g) = 2ClF3(g) From the above-balanced chemical equati...
Q: B. Direction: Complete the following table and use the Ideal gas equation to calculate pressure, vol...
A: Ideal gas equation PV = nRT P = pressure V = volume T = temperature n = moles R = gas constant = 0...
Q: Write the net ionic equation for the reaction that occurs when barium hydroxide reacts with magnesiu...
A: Given that in question a barium hydroxide and magnesium sulfate. Barium hydroxide and magnesium sulf...
Q: A gas container has a volume of 35.0 Lat 150 bar. Determine the volume (in L) this gas would occupy ...
A: According to the Boyle's law P1V1= P2V2 Where P1 and P2 are intial and final pressure and V1 and V2 ...
Q: Calculate AS°(rxn) in J/K for the following reaction at 373K. Co(g) + H20(g) → CO2(g) + H2(g) Δ (rxn...
A: Entropy is defined as the degree of randomness.
Q: A sample of acetic acid is titrated with a standardized NaOH solution. Before the end-point of the t...
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Q: What ia the volume of a helium ballon that contains 3.13 mol helium at 27 degrees celius and 1.10 at...
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Q: Is the sugar shown reducing or non-reducing? но HO HO- HOHO HO. HO- O reducing O non-reducing
A: The compound given is,
Q: What volume of ethanol is required, per gram of benzil, to generate a solution with a concentration ...
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Q: What is the osmotic pressure (in atm) of a solution of a protein (molar mass - 6.27X 10 a/mol) at 30...
A: Given Mass = 0.160 g Molar mass = 6.27 * 103 g/mol Temperature = 30°C = 303°K Volume of solution = 1...
Q: Label each substance listed below as an element (E), compound (C), heterogeneous mixture (He), or ho...
A: All of your previously answered questions are right except #9
Q: How many grams of potassium are in 4.25 kg of apples if an apple contains 159 mg potassium and there...
A: The given problem can be dealt with dimensional analysis concept. We can calculate the grams of pota...
Q: A solution with a pH of 2.58 will have a [H+] of what?
A: We have to calculate the hydrogen ion concentration..
Q: A 2.0 L flask is filled with 0.10 bar of HI gas and decomposes to H2 and 12 at 453°C, find the equil...
A: Kp is the ratio of the equilibrium partial pressure product over equilibrium partial pressure reacta...
Q: The diagram below is the Born-Huber cycle for the formation of crystalline potassium fluoride. K(g) ...
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Q: What should be the pH of a solution in the cathode half-cell if the following voltaic cell is to hav...
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Q: Which reaction mechanism is most likely? CH3 CH3CH2OH Br CH3 Br CH3CH2OH CH3 Br CH3CH2OH CH3 Br CH3 ...
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Q: Use Le Chatelier’s Principle to decide what happens to the [PH3]. All are gases. 4 PH3 + 2 H2 + 9 O2...
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Q: Consider the following standard reduction potentials: Fe3+ (aq) + e - Fe2*( aq) MnO4 (aq) + 8 H*(aq)...
A: Ans: MnO4- ( Mn is having highest reduction potential. Therefore Mn act as strong oxidizing agent).
Q: What should be the pH of a solution in the cathode half-cell if the following voltaic cell is to hav...
A:
Q: The following are electrolytes, except: Select one a. Salts b. Bases C. Acids d. Organic compounds
A: Electrolytes are substance that conducts electricity after dissociation in solution.
Q: The pH of dissolving 1.48 g of propanoic acid (CH3CH2COOH, Ka 1.3X105) in 200 mL H20 is 4.82 O 3.71 ...
A:
Q: If 5.13 g of B5H9 reacts with 14.11 g of O2 by the following reaction, what is the maximum amount (i...
A:
-Explain why Antarctica has a bigger ozone hole than the Arctic.
-What is the significance of Raolt’s law with respect to cloud droplet formation?
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- Ozone depletion at mid-latitudes may be caused by the denitrification of cold sulphuric acid droplets. Is this correct?please explain the reason.The bonds that hold the atoms in a molecule together behave like simple springs. As a result, atmospheric molecules oscillate at frequencies similar to that of infrared radiation, so that these molecules can both absorb and emit infrared radiation (i.e., resonance). Make a simple sketch to illustrate the greenhouse effect by showing:- infrared radiation originating at the Earth’s surface- a carbon dioxide molecule (with springs) in the atmosphere- any radiation absorbed by the molecules being reemitted in a random directionWhy does the presence of the molecule change the Earth’s temperature?The total volume of hydrogen gas needed to fill the Hinderburg was 2.00 x 108L at 1.00 atm and 25.0oC. How much energy was evolved when it burned?*hint - Use the Ideal Gas Law to obtain the moles of hydrogen gas. 2 H2(g) + O2(g) --> 2 H2O(l) ΔH = -572 kJ
- Explain the Greenhouse Effect: Global Warming and Climate Change.The world burns approximately 3.7 * 1012 kg of fossil fuel per year. Use the combustion of octane as the representative reaction and determine the mass of carbon dioxide (the most significant greenhouse gas) formed per year. The current concentration of carbon dioxide in the atmosphere is approximately 399 ppm (by volume). By what percentage does the concentration increase each year due to fossil fuel combustion? Approximate the average properties of the entire atmosphere by assuming that the atmosphere extends from sea level to 15 km and that it has an average pressure of 381 torr and average temperature of 275 K. Assume Earth is a perfect sphere with a radius of 6371 km.A commercial 737 jet transporting 143 passengers and 5 crew members from Kansas city (MCI) to Baltimore (BWI) burned 11800 lb. of Jet A fuel. Jet A fuel is kerosene based, consisting primarily of CnH2n+2 hydrocarbons, with n = 6 to 16, so the Carbon:Hydrogen ratio is close to 1:2. During this flight , how much CO2 (in kg) was released into the atmosphere? (assume the combustion of fuel was complete, so all fuel was converted into H2O and CO2).
- An industrial factory makes an effort to reduce the amount of nitrogen dioxide (NO2) emissions it releases into the atmosphere on a weekly basis. Which statement de- scribes the most likely reason for this effort by the industrial factory? A The factory wants to decrease the amount of tropospheric ozone 3) that is formed when nitrogen dioxide N2) emissions react with sulfur dioxide 02). B. The factory wants to decrease the amount of stratospheric ozone 3/ that is (NO) formed when nitrogen dioxide emissions mix with fog. The factory wants to decrease the amount of gray smog that is formed when nitro- gen dioxide N2) emissions mix with fog. The factory wants to decrease the amount of photochemical smog that is formed when nitrogen dioxide 2) emissions react with VOCS and mix with fog.Explain the role of ozone gas in troposphere and stratosphere. What do you understand by ozone layer depletion? Explain the causes and solution of ozone layer depletion.What emissions from human activities lead to ozone depletion? What are the chlorine reactions that destroy stratospheric ozone?
- Give a brief awnser to: What is the reasoning behind natural global warming? What is the reasoning behind man-made global warming?How do chemists know that none of the individual Lewis structures of ozone are not accurate depictions of an ozone molecule, and how is this discrepancy addressed?The atmosphere of Mars is 96% CO2, with a pressure of approximately 6 * 10−3 atm at the surface. Based on measurements taken over a period of several years by the Rover Environmental Monitoring Station (REMS), the average daytime temperature at the REMS location on Mars is –5.7 °C (22 °F), while the average nighttime temperature is –79 °C (–109 °F). This daily variation in temperature is much larger than what we experience on Earth. What factor plays the largest role in this wide temperature variation, the composition or the density of the atmosphere?