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what is the gas constant used for?
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derive the following equation: Aav100/((C1/A1)+(C2/A2))
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How much energy is required to vaporize 158 g of butane (C4H10) at its boiling point, if its Hvapis 24.3 kJ/mol? Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction: 2NO2 2NO + O2 In a particular experiment at 300 C, [NO2] drops from 0.0100 to 0.00650 M in 100 s. The...
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What molar ratio of sodium acetate to acetic acid (NaAc/HAc) should be used in preparing a buffer having a pH of 4.35? (Ka = 1.8 10 5 for acetic acid.)
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Using the following balanced equation: Zn(s) + 2 HCl(aq) = ZnCl2 + H2 Suppose at STP that 2 moles Zn react with sufficient HCl(aq) Which one of the following operations is correct for determining the volume of hydrogen , H2 gas produced ?
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A 500.0g iron bar at 212C is placed in 2.0L of water at 24.0C. what will be the change in temperature of the water? (assuming no heat is lost to the surroundings)
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what volume will 5.6 moles of sulfur hexafluoride gas occupy if the temperature and pressure of the gas are 128C and 9.4 atm?
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hydrolysis if serylglycine
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A generic salt, AB, has a molar mass of 219 g/mol and a solubility of 6.20 g/L at 25 C what is the Ksp of this salt
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I will to the homework and to prepare to examination
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- 1. For organic chemistry, what is a concerted shift? How do things like acids or heat affect them? What other factors affect them?
- 2. Which of the following reactions is an acid-base neutralization reaction? Why are the rest of the answers incorrect?
- A. AgNo3 (aq) + NaI (aq) --> AgI (s) + NaNO3 (aq)
- B. S8(s) + 8O2 (g) --> 8SO2(g)
- C. Na3PO4 (s) + 2H2O (l) --> H2 (g) + 2NaOH (aq)
- D. Ca (OH)2 (aq) + 2HI (aq) --> CaI2(aq) + 2H2O (l)
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