Chemistry question and answers for July 16, 2023
- Q A gas mixture containing 60% N2 and the balance n-hexane flowsthrough a pipe at a rate of 200m3/hr. The pressure is 2atm absoluteand the temperature is 100 ï‚°C. a) What...
- Q expression of schottky defects in a TiO2 crystal
- Q When baking eggs, which has a bigger impact on the brittlenessof the shell of the egg-an electric oven which has drier air or agas oven and why?
- Q 6)Draw perspective formulas for the acetonide formed from themeso and racemic hydrobenzoin (use models or PC Spartan ifnecessary to visualize these compounds).7)Based on your structures in question 6.a)How many H...
- Q which one is more easily oxidized.Copper or hydrogenIron or HydrogenMagnesium or HydrogenZinc or hydrogenlist the element in the most easily oxidized to the least easilyoxidized.Calcium, cesium, copper, hydrogen, iron, magnesium...
- Q The solubility-product constant for K2PdCl6 is 6.0x10^-6(K2PdCl6(s) ----->2K+ + PdCl6(2-). What is the K+ concentration of a solutionprepared by mixing 50.00 mL of 0.200 M KCl with 50.00 mLofa) 0.0800...
- Q Construct the titration curve, for the titration of50.0 mL of 0.125 M trimethylamine with 0.175 M HCl (aq). (Use graphpaper and show all your work for full CREDIT)Calculate the initial...
- Q What are the enzymatic regulations in breakdown of glycogen?
- Q Dichloroethane C2H4Cl2 is acommon industrial solvent. underground behind an abandoned plant a700m3 volume of soil is found to be contaminated withthis chemical to an average concentration of 50 ppm. a...
- Q 1). Nitromethane (CH3NO2) burnsin air to produce significant amounts of heat. 2CH3NO2(l)+3/2O2(g)→2CO2(g)+3H2O(g)+N2(g)ΔH∘rxn=−1418kJ How much heat isproduced by the complete reaction of 6.91 kg ofnitromethane?2). The air within a cylinder equipped...
- Q Determine the theoretical yield in mL when 1.5 mL of3,3-dimethyl-2-butanol and 7 drops of H2SO4 (conc) are heatedtogether at 70 degrees C. The product will have a molecular weightof 84.16...
- Q Find the pH of each of the following solutions of mixtures ofacids.0.135 M in HBr and 0.120 M in HCHO20.155 M in HNO2 and 8.5×10−2 M in HNO30.190 M in...
- Q 100mL of ~0.1M KMnO4solution was transferred to1000mL volumetric flask and dilute to the mark with distilled waterbut accidently I added 50mL more water (50 mL excessed, total1050mL.)0.1002g of Na2C2O4 and...
- Q 1.) 50 protons, 68 neutrons, and 46electrons . express your answer in chemical symbol or an Ion .2 ).15 protons , 16 neutrons and 15 electrons .express your answer in...
- Q Determine the values of Ka and Kb for theacid base dissociation reactions and report the percent ionizationfor NH3 and NH4+. (this willrequire you to write the correctdissociation reaction for eachspecies...
- Q 1-An unknown sample does not react with Jones' reagent, does notreact with Benedict's reagent, forms a precipitate whendinitrophenylhydrazine is added to it, but does not form a yellowprecipitate after performing...
- Q 1) What problems are involved in using sunscreens and describewhat is happening internally to someone who has “the bends†andWhat are the two different types of asbestos and what is...
- Q A 35.00 mL solution of 0.2500 M HF is titrated with astandardized 0.1118 M solution of NaOH at 25 degrees C.a.) What is the pH of the HF solution before...
- Q Cryolite, Na3AlF6(s), an ore used in the production of aluminum,can be synthesized using aluminum oxide. Balance the equation.Al2O3(s) + NaOH(l) + HF(g) ---> Na3AlF6 + H2O(g)If 11.3 kilograms of Al2O3(s),...
- Q calculate the pH of 100 mL of a buffer that is .080 M NH4Cl and.105 M NH3 before and after the addition of 1.00mL of 6.05 MHNO3
- Q Calculate the concentration of all species in a 0.155 M solutionof H2CO3.Express your answer using two significant figures.[H2CO3], [HCO−3], [CO2−3], [H3O+], [OH−] =  M Â
- Q Portions of orbital diagrams representing theground-state electron configurations of certain elements are shownhere:????????????(a)(b)(c)???????????(d)(e)??????????(f)Which violate the Pauli exclusion principle?  a  b  c  d  e  fWhich violate Hund's rule?  a  b  c  d  e  f
- Q If a copper acetate hydrate, Cu (C H O ) .zH O compound is foundto contain 31.82% Copper, x232y2 59.14% acetate, and the remainderis water. What is the empirical formula...
- Q I'm doing a lab report determination of ascorbic acid in vitaminC tablet.The equation used are: IO3- + 8I- + 6 H+ <--> 3 I3- + 3H2OBack titration with thiosulfate: 2S2O3-2...
- Q The pH of 0.30 M solution of HCN is 5.20. Calculate the Ka valuefor HCN.
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