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For a particular reaction, ?H = 139.99 kJ and ?S = 298.7 J/K. Calculate ?G for this reaction at 298 K. Is this reaction spontaneous or unspontaneous?
Determine the half- life, in hours of iodine-123 If the amount of radioactive Iodine-123 in a sample decreases from 0.4 grams to 0.1 grams in 26.4 hours?
Using the oxidation numbers of carbons in malate and oxaloacetate, predict if the conversion of malate to oxaloacetate an oxidation or a reduction. You need to show the calculation of the oxidation numbers
how much energy is needed to heat 24.8g water from 64 degrees to 123 degrees celsius?
What is the hydroxide-ion concentration in a solution formed by combining 200. mL of 0.15 M HCl with 300. mL of 0.091 M NaOH at 25ºC?HCl(aq) + NaOH(aq) ? NaCl(aq) + H2O(l)
If the minimum energy required to break the C-Cl bond in CF3Cl is 540 kJ/mol, what is the longest wavelength of radiation that will break this bond?
Estimate the density of Rb if it crystallizes in a body-centered cubic unit cell and has an atomic radius of 247.5 pm.
Calculate the volume of the NaOH solution prepared in (2) required to react with all of the t-butyl chloride in 1.0mL of the 0.050M solution prepared in (1)?
we will provide a standard solution of 0.100 m nacl and a solution of 20-fold diluted tonic water the unknown for your
What is the value of Kf for acetic acid, given that its freezing temperature is 16.6 C and its density is 1.049 g/mL?
the rate of a first order reaction is 4.6 x 10 to the -4 power at 638k. if the activation energy is 104 kjmol calculate
A solution of ethanol (C2H5OH) in water is prepared by dissolving 67.5 mL of ethanol (density = 0.79 g/cm3) in enough water to make 250.0 mL of solution. What is the molarity of the ethanol in this solution?
Which alkyl bromide reacts fastest with silver nitrate in ethanol- butyl bromide, sec-butyl bromide, or tert-butyl bromide? Which reacts slowest? Explain how structure affects the rate in the SN1 reaction.
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