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You want to prepare 250 ml of buffered solution composed of NH3 and NH4Cl with a pH of 10.1. If you start with 250 ml of 0.15 M NH3 solution, how many grams of NH4Cl salt must you add? Round answer to two decimals. (Assume the salt does not change the volume of solution.) kb for NH3 = 1.8 x10-5
Galvanized nails are iron nails that have been plated with zinc to prevent rusting. The relevant reaction isZn2+(aq)+2e??Zn(s)
Suppose that N2 gas may be described as van der waals gas. This gas (n=1.25 mol) is expanded isothermally and reversibly from a volume of 1 liter to 10 liters at 300K
if 35.0 ml of no2 gas is completely converted to n2o4 gas under the same conditions what volume will the n2o4
the carbacation to produce 2,4,4-trimethyl-2-pentene and 2,4,4-trimethyl-1-pentene. in order to calculate the % yield, could you help with the correct balanced equation for this reaction, as i would need the moles ratio?
72.0 ml of a 1.50 M solution is diluted to a volume of 288 mL. A 144 mL portion of that solution is diluted using 185 mL of water. What is the final concentration
The mole fraction of oxygen molecules in dry air is 0.2095. What volume of dry air at 1.00 atm and 25°C is required for burning 1.00 L of hexane (C6H14, density = 0.660 g/mL) completely, yielding carbon dioxide and water
Oxygen binds to the hemes in myoglobin and hemoglobin. However, when plotting oxygen's ability to bind to the protein vs. O2 concentration myoglobin and hemoglobin have dramatically different graphs. Explain this observation.
evaporate more quickly: 55 mL of water in a beaker or 55 mLmof acetone in an identical beaker under identical conditions?
A solution has a volume of 2.0 L and contains 36.0 g of glucose. If the molar mass of glucose is 180 g/mol, what is the molarity of the solution
15.0 mL of 0.400 M Hno3 Solution is titrated with 0.600 M KOH solution . Calculate pH of the solution when12.0 mL of KOH is added ?
A 300.0-mL saturated solution of copper(II) peroidate (Cu(IO4)2) contains 0.44 grams of dissolved salt. Determine the Ksp.
if an automobile travels 245 mi with a gas mileage of 21.5 migal how many kilograms of co2 are produced? assume that
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