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Allicin is the compound responsible for the characteristic smell of garlic. An analysis of the compound gives the following percent composition by mass: C: 44.4 percent; H: 6.21 percent; S: 39.5 percent; O: 9.86 percent. Calculate its empirical formula. What is its molecular formula given that its molar mass is about 486g?
Potash is composed mainly of potassium caronate, K2CO3. If 1.000g of potash reacts with sulfuric acid to produce 145 mL of carbon dioxide gas at STP, what is the % of potassium carbonate in the marble sample
1.00 W electric heater operates for 10 minutes to hear the gas in a cylinder. At the same time, the gas expands from 2.00L to 10.00L against a constant atmospheric pressure of 1.0 atm. What is the change in internal energy in Joules of the gas
what is the molarity of a sodium hydroxide solution if 34.85 mL of the soution neutralizes 1.883 grams of pure KHP?
A person receives 50 mrad of gamma radiation. Explain what is that amount in grays. Define what would be the equivalents does in millirems
48.61 g of magnesium was dissolved in diluted sulfuric acid and 490 g of MgSO4 . 7H2O was isolated from the solution. How many percent of impurities (if any) did the metal contain?
Silver chloride, often used in silver plating, contains 75.27% Ag.Calculate the mass of silver chloride in grams required to make 6.0 g of silver plating.
Inhibitors helped to elucidate the electron transport chain. For the conditions below what would happen i) if rotenone were added to a suspension of respiring mitochondria or, ii) if cyanide were added.
What is the pH resulting from mixing 50.0 mL of 0.0100 M H2CO3 with 1.50 mL of 0.100 M NaOH?
Calculate the final temperature when a 16.4 gram sample of ice at 0oC is placed into a styrofoam cup containing 126 grams of water at 72.7 oC. Assume that there is no loss or gain of heat from the surroundings.
Calculate the composition of the vapor (mole fraction of each component) that is in equilibrium in the solution at the boiling point of this solution
Addition of 51.5 mL of 2.238 m of H2SO4 (solution density=1.1243 g/mL) to 51.5 mL of 2.238 M BaCl2 gives a white precipitate. What is the mass of the precipitate in grams
On size-exclusion chromatogram you have three peaks 2.9, 3.5, and 4.8 min. Column dead volume is 12mL as well as flow rate 4 ml/min. Are your separation conditions fit for size-exclusion requirements. Define why.
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