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Methanol has a normal boiling point of 46.4 degrees Celsius as well as a heat of vaporization of 53.2 kJ/mol. Explain what is the vapor pressure of methanol at 28.5 degrees Celsius? Answer must be in torr and contain 1 decimal place.
A pipet delivers 10.5, 10.3, 10.9 and 10.7 ml .(a)find the mean volume and deviation from the mean for each and calculate the average deviation from the mean (b) calculate the relative deviation (in %) for this set of data. Relative deviation (%) ..
Calculate the heat released when 25.0 g of water at 0 degrees C crystallizes to ice at the same temp. The specific heat of water is 1.00 cal/(g *degrees C); the heat of fusion is 80.0 cal/g and the heat of vaporization is 540.0 cal/g
What amount of NaOH ( a strong base), in mg, would be required to neutralize 100 mg of H2SO4 (MW=98) in 1 L of water.
Would a buffer containing HF and F- in appreciable quantity be expected to have a pH of around 3,5,7 or 9? Justify your answer.
A geological sample is found to have a Pb-206/U-238 mass ratio of 0.773/1.00. Assuming there was no Pb-206 present when the sample was formed, how old is it? The half-life of U-238 is 4.5 × 109 years.
container a with 150ml contains a gas with an unknown pressure. container b with volume 250ml contains a gas under 628
If 5.45mL of 0.1000 M NaOH solution is needed to just neutralize excess acid after 20.00 mL of HCl was added to 1.00 g of an antacid, how many moles of acid can the antacid counteract per gram
A hydrocarbon undergoes complete combustion to form 6.9 g CO2 and 2.8 g H2O. What is the empirical formula for the hydrocarbon?
Student performed a Kjeldahl nitrogen analysis of a protein sample. The subsequent weight % nitrogen values were determined: 15.5, 13.7, 15.7, 15.4 and 15.8. Explain what is the value of G computed for the Grubbs test. Must the outlier be rejected..
calculate change in gibbs free energy for the reaction cog 12o2g-co2g at 298.15 k. calculate change in gibbs free
What is the energy released when 0.711 g are converted to energy? Express your answer in joules. For self-consistent units you must use kg because 1 J = 1 kg m2/s2.
Mechanism for bromobenzene + magnesium turnings + annhydrous diethyl ether + methyl benzoate + H2SO4 --> triphenylmethanol
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