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The observed rotation of a solution of 1.2 g of a compound in 10 mL of water is -6.9 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound?
A gaseous mixture of O2 and Kr has a density of 1.111 g/L at 420. torr and 300. K. What is the mole percent O2 in the mixture?
Rhombic sulfur turns into monoclinic sulfur, Calculate the transition temperature for this change at a pressure of 1 bar.
The resulting solution required 13.73 mL of 0.176 mol L 1 NaOH(aq) to neutralize the excess, unreacted HCl. What was the percentage by mass of Mg(OH)2 in the original sample
a solution of NaOH is added to the supnatant liquid until it is strongly alkaline. No precipitate is formed. Which ions are present in each of the precipitates. Which cations are not present in the original solution?
If 155 of wet is collected over water at 24 and a barometric pressure of 738 , how many grams of have been consumed? (The vapor pressure of water is 22.38 .)
A solution is made by dissolving 15.5 grams of glucose (C6H12O6) in 245 grams of water. What is the freezing-point depression of the solvent if the freezing point constant is -1.86 °C/m?
Calculate the energy emitted by an electron when it drops from energy level 4 down
A sample of nitrogen gas is contained in a piston with a freely moving cylinder. At 0 C, the volume of the gas is 307 mL. To what temperature must the gas be heated
One can approximate boiling point at reduced pressure using a pressure-temperature nomograph. What would you expect the observed boiling pint to be at 50 torr(mm) for a liquid that has a boiling point
Write chemical formulas for (a)lithium bromide,(b)calcium sulfide,(c) sodium sulfide,(d)beryllium oxide,(e) the chlorine molecule
A quality control chemist at Dow Chemical tried to determine purity of NaOH using titration.He measured out 0.500 g NaOH sample, and dissolved it in 20 mL water. 31.2 mL of a 0.386 mol/L HCl solution was used to reach the end point.
Describe each reaction and provide the name of all the chemical formula involved for each number.
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