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The density of gold is 19.3 g/cm^3. You inherit a gold bar that measures 7.0 inches by 3.0 inches by 2.0 inches. How many ounces does the bar weigh?
The temperature of the calormieter increases from 19.7 C to 20.6 C if under constant volume condidions, the heat of combusion of glucose is -2805 kJ/mol
Calculate the standard reaction enthalpy for the formation of boron trifluoride, which is widely used in the chemical industry:B2O3(s) + 3CaF2(s) > 2BF3(g) + 3CaO(s).
In biochemistry laboratories, solutions of sucrose (table sugar, C12H22O11) are used in high speed centrifuges to separate the parts of a biological cell.
Ammonia reacts with oxygen gas to produce water and nitrogen gas. What mass of oxygen gas must be used to react with 19g of ammonia
If a diamond consisting of ten sextillion "randomly-selected" carbon atoms (roughly a one-Karat diamond) were placed on an anallytical balance, the balance would read.
aqueous solution in the upper intestinal tract where the pH is 5.83. Calculate the percent of sulfisomidine in the neutral form in the solution of the intestinal tract.
Calculate the pH of a solution formed by mixing 65-mL of 0.22M NaHCO3 with 75-mL of 0.15M Na2CO3.
How are fatty acids transported into the mitochondria for breakdown? Which precursor for fatty acid synthesis blocks this transport pathway, and how is that important for the regulation of fatty acid metabolism?
Calculate the number of molecules inside the cell, which is 2.2 ?m long and 1.2 ?m in diameter.
Polly Esther determined the Ca2+ ion content of a 100 mL sample of calcium fortified orange juice. After adding 2.0 M HCl solution to the sample, she filtered the juice to remove the pulp and other particulate matter
You are given 2.56 g of salicylic acid. Using the procedure in the lab manual for the synthesis of aspirin, you recover 0.89 of aspirin. Calculate your percent yield of aspirin
A stream of oxygen was passed at a rate of 20mL per minute at S.T.P. for 1 hour through a silent electric discharge followed by a gas-washing bottle containing aqueous ammonium iodide
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