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A buffer contains 0.50 mol NH4^+ and 0.50 mol NH3 diluted with water to 1.0 L. How many moles of NaOH are required to increase the pH of the buffer to 10.00? (pKa of NH4^+ = 9.25)
Describe all the symmetry planes in the staggered conformation of ethane. Draw a figure and arrows to show any rotational symmetry axes in the staggered conformation of ethane.
How many moles of MgI2 are in 1.3L of a 0.2M solution? How many moles of Mg2+ are in the solution? How many moles of I-?
When an ion-selective electrode for X was immersed in 0.0670 M XCl, the measured potential was 0.0250 V. What is the concentration of X when the potential is 0.0400 V
The final, dried product weighed 0.1314 g. What is the percent weight of Zn (65.39 g/mol) in the original sample
the standard free energy change delta G*T at 500K is equal to 9.8*10^4 J/mol. Calculte the equilibrium constant at 500 K.
Suppose that 28 g of gold is initially at 29.0 degrees celsius. What is the final temperature gold upon absorbing 2.25 kJ of heat?
Calculate the temperature of boiling water at an elevation of 6000ft (2000m) given that the atmospheric pressure is 0.8atm. Assume delta H_vap is independent of T.
The heat of combustion of naphthalene (C10H8) is - 5157 kJ/mol. Using these data and data in Appendix C, calculate the heat of hydrogenation of naphthalene.
in the reaction below, 3.71 atm each of H2 and Br2 were placed into a 1.00 L flask and allowed to react: H2(g) + Br2(g) 2 HBr(g) Given that Kc = 84.1, calculate the equilibrium pressure of HBr.
Compute the number of gms of CoCl2 that would be needed to prepare the solutions:(a) 550 mL of a 1.75 M solution (b) 210 mL of a 0.0180 M solution.
Using the tools you have at hand (a melting point apparatus and TLC setup), what other data could you collect to test your hypothesis from part a? Give two possibilities.
If the walls in a room are 955 square feet in area, and a gallon of paint covers 15 square yards, how many gallons of paint are needed for the room?
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