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A litre of solution containing 0.1 M of CH3COOH and 0.1 M of CH3COONa provides a buffer of pH 4.74 . calculate the pH of a solution after the addition of 0.02 M of NaOH . The dissociation constant of CH3COOH is 4.75x10-5.
4 Fe(s) + 3 O2(g) → 2 Fe2O3(s). If 12.5 g of iron(III) oxide (rust) are produced from 8.74 g of iron, how much oxygen gas is needed for this reaction?
Determine the characteristic wavelengths if an electron are accelerated through an electric potential to a kinetic energy of 18kev.
2 NH3 + CH3OH → products . How much NH3 is needed to react exactly with 21 grams of CH3OH
for a certain change the value of U is -2.37 kJ. During the change, the system absorbs 650 joules. how much work did the system do.
Determine What would be the total volume in the graduated cylinder if density of Ag= 10.5 g/mL.?
How many possible trisubstituted derivatives C6H3X2Y can be obtained from the para disubstituted benzene C6H4X2?
55.0 mL of a 1.70 M solution is diluted to a volume of 278 mL. A 139 mL portion of that solution is diluted using 175 mL of water. What is the final concentration.
How many moles of HCl need to be added to 150 mL of 0.50 M NaZ to have a solution with a pH of 6.50? (Ka of HZ is 2.3e-5). Assume negligible volume of the HCl.
Explain Cyclopentadiene reacts as a diene in the the Diels-Alder reaction a great deal faster than does 1,3 butadiene.
The equilibrium constant at 427°C for the reaction N2(g) + 3H2(g) 2NH3(g) is Kp = 9.4 × 10-5. Calculate the value of ΔG° for the reaction under these conditions.
Calculate brightness of a wavelength undergoing Rayleigh scattering.
What volume of 4.7 M NaOH is required to react completely with 1.7 mL of a 1.51 M HCl solution?
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