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Some materials can be used to measure a background spectrum. What materials are usually used as the background of solid FTIR and what chemical is used as standard of 1H NMR
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As the liquid vaporizes the plunger is pushed out. At equilibrium, the plunger reads 6.51 mL of gas. Atmospheric pressure is 740. mmHg. What is the approximate molar mass of the compound (in g/mol)?
Problem- Calculate the amount of heat in kilojoules released when 50 grams of steam at 125 degrees Celsius are converted to 50 grams of ice at -125 degrees Celsius.
What is the time required to reduce the concentration of lactose in 2 L of milk from an initial value of 2.50 mg/mL to a final value of 1.5 mg/mL.
In extracting an organic compound from an aqueous solutin, what is the practical advantage to having the organic solvent be more dense
A solution is prepared by dissolving 159 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
Calculate the number of grams of HC2H3O2 needed to make 450 mL of 0.322 M solution.
What is the Freezing/Boiling point of 21.5g of NaCl in 139ml of water. Assume the vant hoff factor is 1.8.
The subsequent are kinetic data for a reaction. Explain what is the order of the reaction, define what is the rate constant
how many grams of the compind potassium chloride must be dissolved in 200 grams of water to make a saturated solution at 60 C.
Draw a formula for the lowest molecular weight compound that contains C, H, and possibly O, is a chiral compound, contains ONLY one functional group,
A 10 ml sample of gastric juice was obtained from a patient several hours after a meal. The gastric juice was then titrated with 7.2 ml of 0.1 M NaOH to neutrality
using a sample of gas having 1.47 mol at the temperature of twenty five degree celsisu exerts a pressure of 398 torr
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