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When the cations Na+, K+, Rb+, Cs+ are combined with chloride ion in the gas phase to form ion pairs, which pair formation releases the greatest amount of energy?
The reduction of benzaldehyde by NADD leads to lower Vmax even all the conditions are kept constant. Provide a reason that explains this data
Given the following equation. What is the maximum mass of FeO3 that can be prepared when 360.0g of FeS2 are mixed with 47.5g of oxygen gas? A balanced equation is this: 4 FeS2 (s) + 11 O2 (g) ---->
The boiling point of methanol (CH 3 OH) is 64.7 o C and delta H vap = 71.8 kJ/mol. What is delta S for the vaporization of 2.15 mol of CH 3 OH at 64.7 o C?
What is the pH of the solution formed by mixing 45.0 mL of 0.183 M potassium hydroxide and 65.0 mL of 0.145 M hydrochloric acid?
Calculate the pH of the following solutions: 1.) 0.100 moles of HF and 0.120 moles of NaF in a 1.00 liter solution.--- 2.) a solution that has 0.10M NH4NO3 and 0.10 M NH3.--- 3.)0.100 moles of HF an
K a for aspirin (acetylsalicyclic acid) is 3.0 x 10 -4 at 25°C. What is the the acetylsalicylate anion, the conjugate base of aspirin?
A typical bathtub can hold 100 gallons of water. Calculate the mass of the natural gas that would need to be burned to heat the water for a tub of the is size from 65 degrees farenheight to 108 degr
Nitroglycerin (C3H5(NO3)3 is a stock sensitive liquid that detonates that is it decompresses explosively to form N gas, steam, carbon dioxide gas, and oxygen gas. Calculate the volume of product gas
Hydrogen peroxide (H2O2) decomposes according to the equation H2O2(l) ? H2O(l) + (1/2)O2(g). Calculate Kp for this reaction at 25oC. (Ho = -98.2 kJ/mol, So = 70.1 J/K•mol)
Complete and Balance the following redox equation. MnO4 + H +Br-->Mn2 +Br2 +H2O (acidic Solution). The sum of the smallest whole number coefficients is
Calculate the number of moles of ammonia absorbed by a boric acid solution if 3.25 ml of 0.0025 M H2SO4 were needed to titrate the solution to the end point ( Assume both hydrogens of the sulfuric a
Top prepare for this week's lab, you added a KCL solution , Devarda's alloy, and MgO to your soil sample in order to analyze for mineral nitrogen. Sketch a jar containing soil and indicate hoe the n
You will titrate a boric acid solution that has absorbed the ammonia from a soil sample. It is not necessary to know the exact volume or concentration of the boric acid. Explain why not
Draw an oxygen consumption cruve for a suspension of isolated mitochondria when the following compounds are added in the indicated order. With the addition of each compound all of the previously add
What is the de Broglie wavelength (in nm) associated with a 2.50-g Ping Pong ball traveling 35mph?
Determine the equilibrium partial pressure of NH3 in a reaction vessel that initially contained 0.900 atm N2 and 0.500 atm H2 at 648K.
A 2.50 mL buffer solution is .250 mol in acetic acid and .250 mol in sodium acetate. (Ka=1.8x10 to the -5). What is the initial pH to the buffer solution
Calculate the pH of a 1.36x10^-2M solution of the decongestant ephedrine hydrochloride if the pKb of ephedrine (its conjugate base) is 3.86.
Ascorbic Acid (Vitamin C) is diprotic acid (Ka1= 8.00x10^-5 and Ka2= 1.60x10^-12). What is the pH of a 0.250M solution of ascorbic acid?
Calculate the pH of a 1.00L of buffer that is 0.120M HNO2 and 0.180M NaNO2. What is the pH of the same buffer after the addition of 1.00mL of 12.0M HCl. (pKa of HNO2=3.04)
How many milliliters of 0.100 mol of KOH solution are needed to completely neutralize the HCl in 300 mL of a hydrochloric acid solution that has a pH of 2.25?
The atoms in Barium metal are arranged in a body-centered cubic unit cell. Calculate the radius of a Barium atom if the density of barium is 3.5 g/cm3
Using a band diagram, explain how magnesium can exhibit metallic behavior when its 3s band is completely full.
Use the collision theory to calculate the theoretical value of the second-order rate constant (in m3 mol-1 s-1) for the gas-phase reaction D2 + Br2 = 2 DBr at 450 K assuming that it is elementary bi