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Problem
Calculate the empirical formula for vanillin based on the following elemental mass percent composition in a 100g sample: 63.15% C, 5.30% H, 31.55% O.
How will you prepare the following solutions from 6.0 M solution of acetic acid? Give exact details. Assume that a 10-mL graduated cylinder (in which volumes can be read to the nearest 0.1 mL) and a 100-mL graduated cylinder are available.
A gas sample has an original volume of 650 ml when collected at 750 mm and 30°C. If a change is made in the gas temperature which causes the volume of the gas sample to become 800 ml at 1.00 atm, what is the new temperature
What mass of this polymer was initially added to the osmometer? Pleases assume that the density of the aqueous polymer solution remains 1.00g/mL.
hours in the presence of a certain concentration of an acid catalyst, what is the half-life for this reaction under the same conditionns? (Rate = k[C12H22O11]
What final temperature, in degrees Celsius, is needed to change the volume of the gas to each of the following, if P and n do not change
how many liters of hydrogen are obtained from the reaction of 4 g calcium with excess water, at 37 Celsius and 0.962 atm?
Among these 3 [10] annulenes, only compounds 1 and 2 were isolated, compound 3 is very unstable. Explain.
A 1.00 L flask is filled with 1.00 g of argon at 25 °C. A sample of ethane vapor is added to the same flask until the total pressure is 1.350 atm. What is the partial pressure of argon in the flask and what is the partial pressure of ethane in the..
Calculate the concentration of the hydronium ion and the the pH in a solution that is formed by combining 300 ml of 0.10 M NaOH with 180 ml of .15ml of .15 M H2SO4.
calculate the mass of oxygen dissolved in a 5.00 l bucket of water exposed to a pressure of 1.13 atm of air. assume the
Determine the osmotic pressure of a solution that contains 0.042 g of a hydrocarbon solute (molar mass = 340 g/mol) dissolved in benzene to make a 350-mL solution. The temperature is 20.0°C.
Although there are a great variety of lipid structures, most lipids contain: A) A large hydrocarbon portion and no polar groups B) A large hydrocarbon portion and a few polar groups
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