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If 3.65 mL of vinegar needs 42.0 mL of 0.135 M \rm NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in a 100-mL sample of this vinegar?
Calculate the pressure of a sample of gas collated over at 25 degree celsius if the atmospheric pressure is 0.948 atm. 1 atm = 760 Hg
A 16.96 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 16.58 grams of CO2 and 3.394 grams of H2O are produced.
A first-order reaction has a half-life of 55.0 min at 25 ºC and 6.8 min at 100 ºC. What is the activation energy for this reaction
Cool to the final temp at constant volume and then expand to the final pressure at constant temperature. Calculate the work done for each path.
Write a balanced net ionic equation for the neutralization of equal molar amounts of nitric acid and methyl amine (CH3NH2). Indicate whether the pH after neutralization is greater than, equal to, or less than 7.
How much heat energy, in kilojoules, is required to convert 74.0 g of ice at -18.0 C to water at 25.0 C ?
Low concentration replicate samples of Cd-EDTA gave the following counts in a mass spectral measurement: 178.3, 131.2, 144.3, 159.3, 128.3, 197.7, 149.3, 153.9, 143.3, 160.9. Ten measurements of a blank had a mean of 27.7 counts
Iodine-131 is a radioactive isotope. After 4.00 days, 70.8% of a sample of 131I remains. What is the half-life of 131I
a radioactive substance has a half-life of 46.5 minutes. how many grams of the radioactive substance will remain in a
A 2.0 L glass soda bottle filled with air is tightly capped 18degC and 686mmHg. If the bottle is placed water at 95degC, what is the pressure in the bottle
the density of solutions are assumed to be the same as water. if the density of all 3 solutions was actually 1.1 gml
when 3-methyl-1 5-pentanediol is warmed with polyphosphoric acid the major product has a molecular formula c6h12o. what
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