Chemistry question and answers for August 04, 2023
- Q Discuss the key differences between template synthesis vstemplate-free synthesis
- Q A balloon contains 0.76 mol N2, 0.18 mol O2, 0.031 mol He and0.026 mol H2 at 749 mm Hg. What is the partial pressure of O2?
- Q QUESTION 1. Cool and condense benzene for storage(F&R 8.38)At OzChem plant, benzene vapour is processed as a reagent. Theplant produces benzene as a vapour (at 5780C, 1 atm), which iscooled...
- Q Match each chemical compound below with its correspondingdominant force.Note: The best way to approach this problem is to use thechemical name to draw the formula, and then if necessary draw...
- Q 1. Using a table of standard reduction potentials, standardconditions are assumed.(a) Arrange the following chemical species: Zn(s),Cl-(aq), Cu(s), K(s), and H2(g) in order oftheir ease of oxidation, from easiest to...
- Q The formation constant* of [M(CN)4]2– is 7.70 × 1016, where M isa generic metal. A 0.140-mole quantity of M(NO3)2 is added to aliter of 0.890 M NaCN solution. What is...
- Q 10) If a gas sample is heated, which change is expected?a. Volume would increase.b. Volume would decrease.c. Volume is a fixed quantity; it cannot change.d. The initial and final temperature...
- Q Under what circumstances would we want to use a solvent pair forrecrystallization instead of a single solvent? What can cause'oiling out'?
- Q In Iodometric Analysis of Copper in Copper Oxide, why did I notneed to accurately weigh out the KI used in the standard andunknown analysis?
- Q In what ways are the fuel supply and hormonal signalssimilar in untreated diabetes mellitus and starvation? In what waysare they dissimilar?
- Q What massof Na2SO4 • 10H2O is needed to prepare a solution ofNa2SO4(aq)containing 1.5 × 10^20 anions? (Be sure to indicate the appropriatenumber ofsignificant figuresin the final answer.)
- Q Write four paragraphs (at least a page) talking about LEAD.a. Define LEAD, the means of transportation and transformationof LEAD, the sources of LEAD and the effects it has on human...
- Q Read the following case study:Swan is a 14-year-old student at the Sea-Cow School for thePerforming Arts. Her goal in life is to be a world-acclaimed balletdancer. She has been dancing...
- Q Your book has a wonderful term for the coordinated controlof glycolysis and gluconeogenesis: reciprocal.One is stimulated when the other is suppressed. But notonly physiological conditions have such effect -- so...
- Q Consider the titration of a 24.0 −mL sample of 0.170 M CH3NH2with 0.155 M HBr. Determine each of the following.Part A the initial pH Express your answer using two decimalplaces....
- Q A 65.0 mL solution of 0.118 M potassium alaninate (H2NC2H5CO2K)is titrated with 0.118 M HCl. The pKa values for the amino acidalanine are 2.344 (pKa1) and 9.868 (pKa2), which correspond...
- Q whats the number of signifcant figures of each one?2.46 × 2714.3 - 18.5629.3 ÷ (284 × 4.2)485 ÷ 9.2311.842 + 45.2 + 87.5515.2 - 2.75 + 16.67
- Q 9A ) A 0.1752 g sample of solid primary standard AgNO3 wasdissolved in water and titrated with 21.672 g of dilute KSCNsolution. Calculate the weight molarity of KSCN solution?
- Q Answer the following questions:a. Define expansion work vs. non-expansion work.b. Referring to the definition of the Gibbs energy (Eq. 6.9 inyour text), show that dG represents the maximum amount ofnon-expansion...
- Q The mass of a 25.850g piece of copper is measured three timeswith two different balances with following resultsTrial Method 1 (g)1) 25.7472) 25.7453) 25.748Trial Method 2 (g)1) 25.702)25.753) 25.71c. Calculate...
- Q An anctacid tablet was dissolved in 26.00ml of 0.650M HCl. Theexcess acid was back titrated with eactly 11.34ml of 1.05M NaOH.The average weight of a tablet is 0.834g. The tablet...
- Q The main defect in stoichiometric CsIis the Schottky defect. The fraction of lattice sites that exhibitSchottky defects as a function of temperature, is as follows: 1.08x 10exp-16 at 300 K,...
- Q 1.What is the coordination number for each of the followingcomplexes?[Co(NH3)4Cl2]+[Pb(EDTA)]2?[Cu(NH3)4]2+[Ag(NH3)2]NO32.What is the charge on each of the following complex ions?hexaaquachromium(II), [Cr(H2O)6]?tris(carbonato)ferrate(III), [Fe(CO3)3]?diaquatetrabromovanadate(III), [V(H2O)2Br4]?3.What is the oxidation number of the central...
- Q Aluminium oxide is a white , crystalline powder . it can be used asan adsorbent or a catalyst for organic reactions and is formed whenaluminium reacts with oxygen . A...
- Q An older naming system uses Latin names of the elements. Forexample, the Latin name of iron is ferrum (which gives iron itssymbol of Fe). For metals that can have more...
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