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Calculate the oxidation number of the indicated elements a) Br in BrO-b) Cr in Cr2O3 c) N in HNO2
a 280ml flask contains pure helium at a pressure of 754 torr . a second flask with a volume of 475ml contains pure
Determine which of the following pairs of reactants will result in a spontaneous reaction at 25 degrees C.
physical properties of diethyl ether c2h52o are given as .deltahdeg fusion 7.66 kjmol melting point -116.0degc
A solution containing toluene had a gas chromatographic peak area of 412420. While 0.7130g of this solution was spiked with 0.0178g of pure toluene, the signal was 731508. Explain what is the concentration of toluene in the original solution. Mass..
A chloride solution, prepared by dissolving 0.2789 g of an unknown sample in 250.00mL as well as taking a 10-mL aliquot of the resulting solution, requires 11.21mL of the same silver nitrate solution to reach the end point. Explain what percentage..
Silicon and germanium are both semiconducting elements from Group 14 in the periodic table, and both can be doped to improve their conductivity.
A student added a total of 15.00 mL of 0.5241 M HCl to 1.4881 g to of an unknown which contained CaCO3 (molar mass = 100.09 g/mol). The resulting solution required 12.21 mL of 0.1211 M NaOH to back titrate the excess HCl. What was the percent CaCO..
what volume and mass of steam at 100 degrees c and 1.00 atm would during condensation release the same amount of heat
fe3 can be identified in solution by breaking apart the ion iii hydroxide putting fe3 back into solution and then
Xenon can be the central atom of a molecule by expanding beyond an octet of electrons. Draw Lewis structure for the following xenon compound.
A. Differentiate the following terms for waste products; 1. Garbage 2. Sewage 3. Refuse 4. Rubbish
When a small ice cube at -10 °C is put into a cup of water at room temperature, which plays a larger role in cooling the liquid water: the warming of the ice
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