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A buffer is prepared by adding 5. g of ammonia, NH3, and 20.0g of ammonium chloride, NH4Cl, to enough water to form 2.50 L of solution.
a) What is the pH of the buffer?
b) Write the complete ionic equation for the reaction that occurs when a few drops of nitric acid are added to the buffer.
c) Write the complete ionic equation for the reaction that occurs when a few drops of potassium hydroxide solution are added to the buffer.
The frequency factor A for a certain reaction at 75oC is 8.7 x 1012 s-1, and the activation energy 63 kJ/mol. What is the rate constant for the reaction at that temperature
If an aqueous solution of certain organic compound has a density of 1.063g/mL, an osmotic pressure of 12.16atm at 25o C, and a freezing point of -1.03 o C. The compound is known not to dissociate in water. Explain what is the molar mass of the com..
Potassium hydrogen phthalate (KHP) is used as a primary standard acid to accurately find out the molarity of a NaOH solution via a titration. The formula of KHP is KHC8H4O4 and has a molar mass of 204.23 g/mol.
Suppose a reversible heat pump transfers heat from the outdoors at 0 degrees C to a room at 20 degrees Celsius. For each Joule of work input to the heat pump, how much heat will be deposited in the room?
Question- Draw (with structures, cofactors, co-enzymes, enzyme names, etc) the pathway for oxidation of oleate CoA to 9 acetyl CoA molecules (oleate is activated by a thioester-linkage to CoA).
Gallium arsenide (GaAs) has the zinc blende structure. The gallium atoms are in FCC packing and the arsenic atoms occupy half the tetrahedral sites. Calculate the density of Gallium arsenide (GaAs)
Write the Bronsted-Lowry chemical equation describing how C2H5NH2 behaves when add to water. Indicate whether C2H5NH2 behaves as an acid or a base
A 1.17 g sample of an alkane hydrocarbon gas occupies a volume of 674 mL at 28°C and 741 mmHg. Alkanes are known to have the general formula CnH2n+2.
what is the uncertainty in the momentum of an electron if its position has been determined to an accuracy of ±10 poco meters?
The fragment is dissolved in 50.00 mL of (H_{2}SO_{4}) solution is then treated with 2 g of Kl and 50.00 mL of the potassium iodate solution (1L of 0.01000M solution requires 2.14g of potassium iodate).
Determine the actual coefficient of performance of the heat pump.- The reversed Stirling ASC coefficient of performance for this unit.
1. What type of process is involved in going from element to compounds and vice versa?
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