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if you calculated the concentration of B-Carotene in your 2.00mL sample to be 2.082x10-6 M, how many grams of B-Carotene are in your sample? The molar mass of B-carotene is 536.85g/mole.
The solubility of N2 in blood can be a serious problem (the "bends") for divers breathing compressed air (78% N2 by volume) at depths greater than 50 ft.
The zinc content of a 1.23 g ore sample was determined by dissolving the ore in HCl, which reacts with the zinc, and then neutralizing excess HCl with NaOH. Zn+2HCl-->ZnCl2+H2
Another student was in a hurry and stopped heating, even though bubbles were still emerging from the rubber tubing. 3.) A student used the measure of Flask no.1 to be 250mL, without measuring the volume as directed
Determine the mass of the lead in grams if the water level in a graduated cylinder initially at 224 mL rises to 274 mL after a piece of Pb is submerged?
Calculate concentrations of H30+ and the pH of each acidic solution. Since HCl is a monoprotic acid, the H30+ concentrations are equivalent to HCl. First do equation: (M con)(V con)=(M dil)(V dil)
Explain why Markovnikov's rule is needed to predict the products of hydration and hydrohalogenation, but is not needed to predict the products
A solid mixture contains MgCl2 and NaCl. When 0.5000 g of this solid is dissolved in enough water to form 1.000 L of solution, the osmotic pressure at 25°C
to find Sorxn and determine if the reaction is spontaneous at 900oC.(2 pts). 2NH3(g) + 3CuO(s) %u2192 3H2O(l) + N2(g) + 3Cu(s)
Suppose that in changing samples, a portion of the water in the calorimeter weere lost. In what way, if any, would this change the heat capacity of the calorimeter?
An automobile gasoline tank holds 22kg of gasoline. When the gasoline burns, 85kg of oxygen is consumed & carbon dioxide & water are produced? What is the total combined mass of carbon dioxide & water that is produced?
calculate the percentage of empty space in 1 mol of water at 25C. Obtain the density from the experiment " Some Measurements of Mass and Volume." The volume of a molecule of water can be taken as the sum of the volumes of the two hydrogen atoms.
Propose a structure for a molecule with a molecular formula C10H13NO and the following 1H NMR data. Briefly explain your answer.
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