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Question 1: Describe the properties of alkali metals. Based on their electronic arrangement, explain whether they exist alone in nature.
Question 2: Describe an electron cloud. Then, name and explain a particular atomic model that used the concept of the electron cloud.
a lagoon with volume 1200 m3 has been receiving a steady flow of non-conservative waste at a rate of 100 m3 day for a
Find the empirical formulas for compounds with the following compositions: a. 8.74% magnesium, 91.26% iodine b. 36.86% nitrogen, 63.14% oxygen
Products of combustion are then exhausted to the atmosphere. Calculate partial pressures of gases in the exhaust of the tool if 0.1 g of butanol is ignited in a chamber with the initial volume of 1.4 l at 1 atm. Exhaust temperature is 55 oC. Air c..
Describe how you would prepare a 500 mL of a solution which is 0.500 M sodium and 1.60 M phosphate if you only had sodium chloride and potassium phosphate available
Determine molality and the change in temp? If know those can plug them into the same equation: change in temp = iKfm
a mixture of caco3 and cao weighing 0.711 g was heated to produce gaseous co2. after heating the remaining solid
Explain why treating a mixture of vanillin and eugenol to steam distillation would result in distillation of eugenol only
Enough of a monoprotic acid is dissolved in water to produce a 0.0193 M solution. The pH of the resulting solution is 6.31. Calculate the Ka for the acid.
Write the mechanism showing electron flow with arrows, for the acid-catalyzed hydrolysis of methyl benzoate
Calculate the enthalpy change in kJ when 21.6g of H2S is burned. 2H2S(g) + 3O2(g) --> 2SO2(g) + 2H20(g) Change in H=-1036kJ/mol
Chromium metal can be produced from the high temperature reaction of Cr2O3(chromium(III) oxide) with silicon or aluminum by each of the following reactions
Find the pH solution & Hydronium ion concentration and What is the pH of a solution of 0.17 M acid and 0.81 M of its conjugate base if the pKa = 8.62?
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