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Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.150 M HClO(aq) with 0.150 M KOH(aq). The ionization constant for HClO is 4.0*10^-8 a)before addition of any KOH b)after addition of 25.0 mL of KOH c)after addition of 40.0 mL of KOH d)after addition of 50.0 mL of KOH e)after addition of 60.0 mL of KOH
calculate the specific heat of a metallic element if 478 J of energy are needed to raise the temp. of a 82.73 g sample from 25.0 C to 50.0 C. what is the most likely identity of the element
What is the percent yield of a reaction in which 260. g phosphorus trichloride reacts with excess water to form aqueous phosphorus acid (H3PO3) and 127 g HCl?
If all the energy obtained by by burning 1.26 lb of butane (fuel value is 10.85 kcal/g) is used to heat 126.0 kg of water at an initial temp of 19.7C, what is the final temperature.
Titanium crystallizes on a body-centered cubic lattice with a unit cell edge length of 3.28 Å. The density of titanium is 4.54 g /?cm3. The atomic mass of titanium is 47.88.
what is the molarity of a solution prepared by dissolving 2.06g of NaOH in a volume of 500.0ml?
A 43.0 g sample of ethylene glycol, HOCH2CH2OH, is dissolved in 540.0 g of water. The vapor pressure of water at 32°C is 35.7 mm Hg. What is the vapor pressure of the water-ethylene glycol solution at 32°C ?
If equal volumes of 0.15 NaOH and 0.10 NaH2PO4 are mixed what type of system is formed? A) Buffer Ka2 B) amphiprotic C) Buffer Ka3 D) strong base
methane and hydrogen sulfide form when 36g H2 reacts with carbon disufide. Calculate the percent yield if the actual yield of CH4 is 69.8
Using the equation E0cell = E0cathode - E0anode, and the reference value of E0 for Cu(II)/Cu(s) for the role that copper plays in this overall cell reaction, determine the value of the standard potential for the half-reaction Zn2+(aq) + 2e- -> Zn(..
Calculate molarity of a KCl solution prepared by dissolving 0.525 moles of Kcl in 250. mL of water.
An 85.0g sample of iron requires 954 J of heat to raise its temperature 25.0C. What is the specific heat of the iron?
Determine the molar mass of the substance if 120.0 grams of a pure sample contained 24.0 mol of the substance. Express your answer in g/mol.?
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