Chemistry question and answers for August 03, 2023
- Q A combustion analysis of a 0.44g sample of an unknown compoundyields 0.88 g CO2 and 0.36 g H2O. If the sample a molar mass of 132g/mol, what is the molecular...
- Q A beaker with 190 mL of an acetic acid buffer with a pH of 5.00is sitting on a benchtop. The total molarity of acid and conjugatebase in this buffer is...
- Q The reaction NO2 (g) + NO (g) ⇌ N2O (g) + O2 (g) reachedequilibrium at a certain high temperature. Originally, the reactionvessel contained the following initial concentration: [NO2]i =0.0560 M,...
- Q Question 28MA2B2 is a molecule where M is the centralatom bonded to 2 atoms of A and 2 atoms of B. The fact that itexists in only one form (no...
- Q Determine the pH during the titration of 35.8 mL of 0.233 Mmethylamine (CH3NH2 , Kb = 4.2×10-4) by 0.233 M HBr at thefollowing points.(a) Before the addition of any HBr(b)...
- Q Suppose you were asked to carry out a crossed-aldol condensationreaction between 4-methylbenzaldehyde and 3,3-dimethylbutanalmodelled after an experiment performed with benzaldehyde andacetone, a. what product would you expect to make? Write...
- Q Hi, I'm having trouble with answering these organic chemistrylab questions. Please give full answers in your own words. Thanksin advance1. Which of the following solvents: acetone, diethly ether,dichloromethane, pentane, THF,...
- Q A 100. ml sample of 0.10 M HCl is mixed with 50. ml of 0.10 MNH3. What is the resulting pH?Thank you!
- Q For the following reaction, 29.8 grams of calcium hydroxide areallowed to react with 24.6 grams of hydrochloric acid. calciumhydroxide (aq) + hydrochloric acid (aq) calcium chloride (aq) +water (l) What...
- Q A titration is carried out using 20 mL of 0.500 M Formic Acid(1.8 x 10-4) with 0.500 M NaOH. Calculate the pH after 10.0 mL,20.0 mL, and 30.0 mL of...
- Q 1. (a) Balance the two reduction half - reactions shown underbasic condi tions: (i) N2-> NH2OH E
- Q During exercise, glycogen in both liver and muscle cells can beconverted to glucose metabolites for ATP generation the muscles. Doliver glycogen and muscle glycogen supply the same amount of ATP...
- Q A student dilutes a solution of 0.100 mol of H3PO4 and 0.150 molof NaOH with water to a volume of 1.00 L but then realizes that the\"distilled water\" used was...
- Q Draw the Lewis structure for the I−3.
- Q Sodium benzoate (C6H5CO2Na) is used as a food preservative.Part ACalculate the pH in 0.052 M sodium benzoate; Ka forbenzoic acid (C6H5CO2H) is 6.5×10−5.Part BCalculate the concentrations of all species present...
- Q Potassium hydroxide is used to precipitate each of the cationsfrom their respective solution. Determine the minimum concentrationof KOH required for precipitation to begin in each case.A) 1.8×10^−2 M CaCl2B) 2.1×10^−3...
- Q some of the hydrated salt spatter out the cruciblebecause of a too rapid heating process. will the reported percentwater in the hydrated salt be reported too high, too low, orunaffected?...
- Q (a) Derive a general expression for the energy differencebetween any two neighboring rotational state (i.e, the differencein energy between the L abd L+L states). (b) How does the energydifference change...
- Q Morpholine (C4H9NO) is a weak organic base withpKb=5.68.Calculate the pH in a 1.10×10−2M morpholinesolution.Calculate the the concentration of C4H9NO in a1.10×10−2M morpholine solution.Calculate the the concentration of HC4H9NO+ in a1.10×10−2M...
- Q In a heat of neutralization lab experiment, why do thetemperatures of the acid and base must be the same? What happens ifthey are not the same?
- Q Â Â Iodide ion is oxidized to hypoiodite ion,IO- , by hypochlorite ion, ClO-, in basicsolution. The equation isThe following initial rate experiments were run and, for each,the initial rate of formation...
- Q In a reaction of an unknown metal that follows the genericreaction (unbalanced) given below,M(s) + HCl(aq) → MCl2 (aq) + H2 (g)a. 0.0900 g of metal is reacted with 50.00...
- Q what is the principle behind salt fractionation of proteins
- Q A typical relaxed sarcomere is about 2.3 μm in lengthand contracts to about 2 μm in length. Within thesarcomere, the thin filaments are about 1 μm long and thethick filaments...
- Q Compare and contrast Native -PAGE, SDS-PAGE, size-exclusionchromatography, and affinity chromatography, ion exchangechromatography. How are components separated by these proceduresand how are they detected? Explain details. hHow are each of thesetechniques...
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