An error due to some peculiarity or bias of the observer (A Instrument Error (B) Personal Error C) External Error (D No Answer

Q: 0.500 g of ethanol [CH3CH2OH(l)] was burned in a bomb calorimeter. The temperature of the water rose...

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Q: vapor pressure

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Q: Lead (Pb) is a heavy metal which has a leaching rate of about 0.0012 mg/L per year. Consider a lake ...

A: Leaching rate of Pb = 0.0012mg/L per year Volume of lake = 2.25x10^9 L Mass of Pb present initially ...

Q: Oxygen was discovered by decomposing mercury (II) oxide. HgO(s) --> Hg (l) + O2(g) What volume of ox...

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Q: Given the following organic compound, what type of polymer is being shown in the diagram and how man...

A: Here, an compound is given have to determine the type of bonding in the compound and how many bond b...

Q: . Provide a curved arrow mechanism for the transformation below. OCH3 Br2 enantiomer Br CH3OH

A: addition of Br2 to alkene leading to the formation of a cyclic intermediate stage.  attack of alcoho...

Q: What is the shape of a molecule with the central atom having two shared and two lone pairs of electr...

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Q: The neutralization reaction between hydrochloric acid and calcium hydroxide produces calcium chlorid...

A: Solution-

Q: A reaction has the stoichiometry: 3A + BC+D. The following data were obtained for the initial rate o...

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Q: Suppose you have an 8-hour ozone value of 0.088 ppm, and a PM2.5 value of 35.7 pg/m3. The AQI value ...

A: AQI stands for Air Quality Index which serves as a means to measure the extent of Air Pollution.

Q: Which statement is true before the stoichiometric point of a weak acid with a strong base? A buffer ...

A: Given Titration of weak acid vs strong base

Q: The diagram shows which level of structure of a protein? hydrogen bond CH, CH H.C CH, hydrophobic in...

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Q: If a reaction has a AG° of –16.0 kJ/mol, will that reaction favor the starting materials or the prod...

A: We have to predict the direction of reaction.

Q: Calculate the solubility (in g / L) of a generic salt with a formula of A2B, a Ksp of  8.20 ×10−11 ...

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Q: The pH of an aqueous solution at 25°C was found to be 2.90. The pOH of this solution is 11.10 The hy...

A: Given :-  pH of solution at 25°C = 2.90  To calculate :-  pOH  [H3O+]  [OH-] 

Q: Mass spectrometry by itself cannot be used for a sample of mixture of drugs. This statement is Tr...

A: Mass spectroscopy is a technique which determines the mass to charge ration of various ions present ...

Q: 1) a kcl a Kcl solution has concentra - a tjon of 2 4 ce ppb what of Kcl is contained mass of this s...

A: Concentration of a solution defines the amount of solute present in a given amount of solution. 1 pp...

Q: e expected produc

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

Q: 1. Using a graduated cylinder to measure volumes, prepare a buffer solution from 20.0 mL of 0.10 M a...

A: Since you have posted multiple questions, we are entitled to answer the first only. 1a) Given: Conce...

Q: 1. The reaction between ozone and nitrogen dioxide at 231 K is first order in both [NO2] and [O3] 2 ...

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Q: Learning Goal: To assign oxidation states to elements in monoatomic ions, polyatomic ions, and neutr...

A: Oxidation number is the amount of charge which would arise when all the bond attached to an atom is ...

Q: What is the product of the following reaction? 1) LDA, THF, -78 °C 2) la

A: Given reaction is : Find the major product of the reaction = ?  Options are :

Q: Find the element with the highest oxidation number in each of the following formulas: a Naz Cr2 O7 (...

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Q: Enter your answer in the provided box. Determine the resulting nitrate ion concentration when 80.0 m...

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Q: How much heat is absorbed by 80.0 g of iron (Fe) when its temperature is raised from 250C to 5000C? ...

A: Given: The specific heat of iron = 0.444J/g.oC Mass of iron = 80.0 g Rise in temperature = (500 - 25...

Q: Determine which will lower the freezing point of water more: 225.0 g of KCl or 225.0 g of Na2SO4? As...

A: We know that., Change in freezing point = freezing point of pure solvent - Freezing point of solutio...

Q: Complete the balanced chemical equation for the following reaction between a weak base and a strong ...

A: According to the Law of conservation of mass " all atoms of different elements must be equal on both...

Q: The concentration of hydroxide ion in an aqueous solution at 25°C is 4.2 x 10 M. What is the concent...

A: Given : Concentration of OH- ion = 4.2 x 10-4 M

Q: Which of the following best describes monocistronic and polycistronic genes? Choose one: A. Monoci...

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Q: How many moles of H are in 8.45 moles of C6H12O6? - Balance the following chemical equation: Al(NO...

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Q: Explain how the concept of atomic number leads to the synthesis of new elements in the laboratory; G...

A: Atomic number is equal to number of protons and also equal to number of electrons in an unchaarged s...

Q: At 25oC the vapor pressure of pure benzene is 93.9 torr. When a non-volatile solvent is dissolved in...

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Q: In an aqueous solution at 25°C, if [H,O*] = 2.9 × 10 M, then [OH] is:

A: Given :- [H3O+] at 25°C = 2.9 × 10-4 M  To be calculated :- [OH-]   

Q: half-life

A:

Q: A solution contains anions with the following concentrations: 0.20 M CO, and 0.01 M Cr If a dilute A...

A: [CO32-]= 0.20 M [Cl-] = 0.01 M Ag2CO3 , Ksp = 1.2 x 10-12 AgCl, Ksp = 1.8 x 10-10    

Q: What is the maximum solubility of Cu(SCN) (Ksp = 1.8 x 1071>) in a 0.10 M KSCN solution? What is the...

A: The amount of solute that can be desolved in a solvent to form a saturated solution is called the so...

Q: Comment on the general features of the predicted (extremely simplified) 1H-NMR spectrum of lycopene ...

A: 1H NMR analysis:

Q: why do electron withdrawing groups destabilise negative charges?

A: Electron withdrawing group stabilize the negative charges   

Q: At a certain temperature, 2.67 mol  SO2 and 1.33 mol O2 are placed in a container. 2SO2(g)+O2(g)↽−−⇀...

A: Given :-  2SO2(g)+O2(g)↽⇀2SO3(g)  Initial moles of SO2 = 2.67 mol Initial moles of O2 = 1.33 mol  Eq...

Q: How many atoms of O are in 12.8 g Li2SO4?

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Q: Consider a first order reaction AB → A + B If the reaction is 34% complete at the end of 39 s, what ...

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Q: Calculate the osmotic pressure for a solution that is 0.6 molar in sodium chloride and 0.5 molar in ...

A: Osmatic pressure = i x C x R x T i = the no. of dissociated ions C = concentration R = gas constant ...

Q: Give 2 examples of High performance liquid chromatography (HPLC) on how or when it is recommended to...

A: High performance liquid chromatography is the modification of liquid chromatography. Now a days it i...

Q: At 25oC the vapor pressure of pure benzene is 93.9 torr. When a non-volatile solvent is dissolved in...

A: Relative lowering of vapor pressure:

Q: Give a clear handwritten answer of this questions..

A: K = Equilibrium Constant of the reaction Q = Reaction Quotient  Reaction Quotient is change at every...

Q: 2,2-dimethyl-1-propanol

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Q: Write the equilibrium constant expression for this reaction: 2H (aq)+so, (aq) H,SO,(aq)

A: • The given reaction is,       2 H+(aq) + SO42-(aq) → H2SO4(aq)      • We need to write the equilibr...

Q: 2. Data for the reaction: 2 NO(g) + O2(g) → 2 NO2(g) are given in the table below: Initial Rate (mol...

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Q: Calculate the mass of each element in Rhenium Bromide (ReBr3) when 93.7 g of Bromine gas (Br2) react...

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Q: A 250 mL solution of 2.5 x 10 M AGNO3 is mixed with 150 mL of 5 x 10 M Na 3PO4- What is the value of...

A: Ans. (a) Value of Q (reaction quotient): The given compounds' reaction is 3AgNO3+Na3PO4 → Ag3PO4+3Na...