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A general chemistry class carried out an experiment to determine the percentage (by mass) of acetic acid in vinegar. Ten students reported the following values: 5.22%, 5.28%, 5.22%, 5.30%, 5.19%, 5.23%, 5.33%, 5.26%, 5.15%, 5.22%. Determine the average value and the standard deviation from these data. How many of these results fell within one standard deviation of this average value?
Estimate the free energy change (?Grxn) for the following reaction at 298 K, if each gaseous substance is present at p = 0.30 atm. 2H2(g) + O2(g) ? 2H2O(l)
chlorine has two stable isotopes of mass 34.97 u and 36.97 u.suppose the percent abundance of the lighter isotope were
Chlorine dioxide reacts in basic water to form chlorite and chlorate according to the following chemical equation: 2CIO2(aq) + 2OH-(aq) --> (aq) + (aq) + H2O(l). If the initial rate of disappearance of chlorine dioxide is 0.230 M/s, what is the in..
The following name is wrong. Identify the functional group then draw the structure based on the incorrect name and fix the name: 2-methyl-1,3-diethyl-5-pentyne.
Solubility of Terpin Hydrate for Chemistry Students, what is the structure of terpin hydrate and is it more soluble or less than starting material?
Explain if a solution has an absorbance value of .398 at a wavelength of 450nm define what is the percent transmittance of this solution at this wavelength
When 0.250 grams of a polymer were dissolved in 22.9 mL of benzene at 21.6 degrees C, the osmotic pressure was found to be 0.044 atm. Calculate the molar mass of the protein.
Consider the following reaction at constant P. Use the information here to determine the value of ?Ssurr at 355 K. Predict whether or not this reaction
Dihydroxybenzene and o-dihydroxybenzene can be separated by TLC using silica gel and a solvent of medium polarity. The ortho isomer has a significantly higher Rf value than the para isomer. Suggest a reason for this difference in Rf values.
Problem- Prior to their phaseout in the 1980s, chemicals containing lead were commonly added to gasoline as anti-knocking agents. A 8.907 g sample of one such additive containing only lead, carbon and hydrogen was burned in an oxygen rich environm..
What is the pH of the solution created by combining 2.00 mL of the 0.10 M base with 8.00 mL of the 0.10 M acid
A beaker of nitric acid is neutralized with calcium hydroxide. Write a balanced molecular equation and a net ionic equation for this reaction.
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