How often are you asked to record the absorbance of the sample at the low temperature?

Q: A water sample was tested for BOD5, which was determined to be 50 mg/L. Which of the following descr...

A: BOD stands for Biochemical Oxygen Demand.  This is a biological method, used for measurements of tot...

Q: (c) O2(g) + 2MgF2(s) → 2MgO(s) + 2F2(g) = 140.76 J/K• mol s° (02g)) = 205.0 J/K•mol rxn S° (F2(g)) =...

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Q: Staring with your pH for the 0.010M NaC2H302 solution, show your calculations for the concentration ...

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Q: Set up the following reactions. Each reaction has to be balanced. a) Ethane reacts with Oxygen in a ...

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Q: Question 16 of 20 How long will it take for the concentration of A to decrease from 1.400 M to 0.729...

A: For zero order reaction,   [A] (final)= - Kt + [A] (initial) [A](initial) = initial concentration of...

Q: 0.0736t wheret is in days. A particular compound decays according to the equation y = ae Find the ha...

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Q: 6. Draw CrCl2(OH2)4 + , CrCl(OH2)5 2+, and Cr(OH2)6 3+ by hand indicating the correct 3D geometry. ...

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Q: Consider the following reaction equation of combustion of glucose, C6H12O6: a. Calculate the enthalp...

A: Mass of Glucose = 5.25 g C6H12O6 (s) + 6O2(g) ------> 6CO2(g) + 6H2O(g)

Q: Please sort each of the following bases from least (top of the list) to most (bottom of the list) ba...

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Q: The lowest triplet state in naphtnalene (C10H8) is about below thne lowest excited by N2/N1 = (92/91...

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Q: The standard free energy of formation of ammonia is -16.5 kJ/mol. N2(g) + 3H, (g) 2NH, (g) 2nd attem...

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Q: A water sample was tested for BOD5, which was determined to be 50 mg/L. Which of the description is ...

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Q: Which of the following statements about the quantum atom are true? Select one or more: O a. The cent...

A: The correct option are as follows:  

Q: A solution is 0.0500 M in NH.Cl and 0.0250 M in NH3. K. (NH,) = 5.70 x 10-10 Calculate the pH of thi...

A:       [NH3] = 0.0250 M    [NH4Cl] = 0.0500 M Ka(NH4+) = 5.70 * 10-10           pH = pKa + log[Conjug...

Q: Predict the product and balance  redox reaction When metallic aluminum is added to a solution of ni...

A: In redox reaction oxidation and reduction takes place simultaneously , i.e one species is oxidized a...

Q: 1.0 mol NaH2PO4 and 1.0 mol Na2HPO4 are added to sufficient water to give a 1L buffer solution. Indi...

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Q: (Review Topics] [References] A buffer is prepared by adding 24.2 mL of 0.49 M NaF to 55.7 mL of 0.49...

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Q: What part fo chromatography is being descibe by the following?                                     ...

A: These all are the terms used in the chromatography.

Q: - Draw the skeletal structure for 1-aminocyclohexene. |- Name the following compound. CH3CH2CHBrCOH

A: The skeletal structure and IUPAC name of the above compounds are given below

Q: How many electrons does a Co atom have in its 3d subshell? number of electrons: 3d elec How many of ...

A: In this question, we have to tell how many electrons are present in 3d subshell of Cobalt atom and a...

Q: 5(a) Use the standard reduction potentials at 25° C in Table 18.1 in Tro, Fridgen and Shaw, and calc...

A: Given,  Mn + Cd2+ → Mn2+ + Cd the standard emf E° of an electrochemical cell for the reaction is:

Q: a mixture of hydrogen and oxygen gasses is indefinitely stable at room temp but if struck by a spark...

A: When molecular hydrogen (H2) and oxygen (O2) are combined and allowed to react together, energy is r...

Q: The oxidation number of the reducing agent increases during oxidation.  True or False?

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Q: - Identify the purpose of each test in the space provided. a) Benedict’s test b) Seliwanoff's test c...

A: Since you have posted more than one question, we will solve only first question for you. If you want...

Q: Calculate the molar masses of the following substances. Write down each way of calculation. a) Cu(NO...

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for y...

Q: A small amount of resin weighing 4.56g occupies a height of a 10-mL graduated cylinder equivalent to...

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Q: calc . the equilibruim concebtration if k = 1.2 x 10^-5 4 If 0.50 mol of NO, is placed in a 2.0L fla...

A: If 0.50 mol of NO2 is placed in a 2.0L flask to create NO and O2 calculate [if keq = 1.2 x 10-5.  

Q: Designate the relative positioning of the functional groups in your assigned molecule. Based on the ...

A: This molecule is synthesised from the cyclohexanone by nucleophilic addition of the cyanide which de...

Q: A small amount of resin weighing 4.56g occupies a height of a 10-mL graduated cylinder equivalent to...

A: A small amount of resin weighing 4.56g occupies a height of a 10-ml graduated cylinder equivalent to...

Q: Consider the schematic reaction    K A --> P a) If the reaction is one-half order with respect to ...

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Q: 6) In an Edie-Hofstee plot of v versus v/[S] what are the units of the y- intercept? 7) The Vmax det...

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Q: A water solution contains 10 mM HCO3 and 0.2 mg/L CO,2-. We also know the solution pH is 8.5. Please...

A: Solution                          Give that  PH = 8.5 Alkalinity It is the ability of substances pre...

Q: The nutritional label on a bottle of soy sauce indicates that one serving (15 mL) of soy sauce conta...

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Q: You make a solution of a weak acid with a pH of 3.75 and the pKa is 5.42 1. Is the solution acidic o...

A: Acid are the solution which donate H+ ion in their aqueous solution and have pH greater than zero an...

Q: ) The percentual weight (w/w) of Carbon in Ca(HCO3)2. ) The amount of substance of 120g of Calcium C...

A: Number of moles = 250 moles 

Q: A chemist needs to create a 50% HCI solution. (HCI is hydrochioric acid. A "50% HCI solution contain...

A: Answer: This question is based on the mixing of two different solutions in such a way that we can ob...

Q: 4. Powdered zinc reacts rapidly with powdered sulfur in a highly exothermic reaction. 8 Zng) + S8() ...

A: Since you have asked multiple question, we will solve the first question for you. If you want any sp...

Q: Calculate the pH for each case in the titration of 50.0 ml. of 0.100 M HCIO(aq) with 0.100 M KOH(aq)...

A: Answer: In this question we have to find out the pH of following four types of solutions at differen...

Q: Dr. Lussier enjoys a bath after a long day. After filling his tub with exactly 216.0 L of hot water,...

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Q: A student set up a titration apparatus that involved using 25.9 mL of 1.57 M acetic acid. The acetic...

A: Given : volume of acetic acid = 25.9 ml Molarity of acetic acid = 1.57 M Molarity of NaOH =0.154 M K...

Q: In one experiment, 0.871 mol of NO is mixed with 0.506O2. Determine which of the two reactants is th...

A: Given,  Number of moles of NO = 0.871 mol Number of moles of O2 = 0.506 mol Limiting reactant = ?  N...

Q: Designate sequentially (1,2) the stereochemistry at the numbered sites in the given drawing of vitam...

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Q: oxidation reaction cannot happen without a reduction reaction.  True or False?

A: The oxidation reaction can not occur without reduction if one substance losses electron then some su...

Q: .37 A calorimeter contained 75.0 g of water at 16.95°C. A 93.3-g sample of iron at 65.58°C was place...

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Q: A set of samples from an abandoned industrial site detected a suspected groundwater contaminant at a...

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Q: Consider the reaction. 2 Pb(s) + 0,(g) 2 PbO(s) An excess of oxygen reacts with 451.4 g of lead, for...

A: %yield = ( Actual yield÷ Theortical yield)×100%

Q: Part E `CH2CH2CH3 Spell out the full name of the compound. Submit Request Answer Part F

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Q: In a second trial of this experiment, the student found the atmospheric pressure to be 755 mm Hg, th...

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Q: Select all of the conditions that indicate equilibrium. A,G = 0 O A,G° = 1 Gof the reaction mixture ...

A: In this question, we have to select the conditions that indicate Equilibrium.

Q: 0.0471 kg of biphenyl (C12H10) is dissolve in benzene (C&H6) to create a solution with a total volum...

A: Given structures are :  Options are :