Two students, each made four measurements of the mass of an object. Their results are shown in the table below: Student A Student B 50.1 g 51.6 g 51.0 g 50.8 g 49.6 g 52.2 g 50.0 g 50.2 g Whose results are more precise? Whose results are more accurate?

Q: Suppose 3.33 g of copper are reacted with excess nitric acid according to the given equation, and 6....

A: Given data: Mass of copper = 3.33 g Mass of Cu(NO3)2 = 6.32 g Standard data: The molar mass of co...

Q: Question 9 Which of the following are a function of the salt bridge in an electrochemical cell? Sele...

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Q: Give the major organic product(s) for each of the following reactions

A: The carbonyl compounds give nucleophilic addition reactions. The carbon atom of the carbonyl carbon ...

Q: Draw the major product of this reaction. Ignore inorganic byproducts. H. 1. CrO3, H2SO4 2. Neutraliz...

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Q: True or False a) The color of an object is the result of the transmission of all colors except the ...

A: The colour of an object is that whose respective the wavelength of light of that colour which it ref...

Q: Consider the balanced equation of KI (molar mass=166.0 g/mol) reacting with Pb(NO3)2 to form a preci...

A: In the given question, we have the following balanced reaction equation: 2KI(aq)+Pb(NO3)2(aq)→PbI2(s...

Q: A chemist adds 1.20 L of a 0.704M calcium bromide (CaBr,) solution to a reaction flask. Calculate th...

A: Given :-  molarity of CaBr2 solution = 0.704 M or 0.704 mol/L volume of solution = 1.20 L  To calcul...

Q: Overall Reaction: 2 NOB (g) → 2 NO (g) + Br2 (g) time, s [NOB|], M 0.0365 600 0.0274 1200 0.0206 180...

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Q: Consider the reaction described by the chemical equation shown. C,H,(g) + H,O(l) C,H,OH(1) AHxn = -4...

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Q: A compound is found to contain 39.12 % carbon , 8.772 % hydrogen , and 52.11 % oxygen by mass. To an...

A: We have to predict the empirical formula and the molecular formula.  

Q: Step 1: N2O5(g) → NO:(g) + NO2(g) Step 2: NO2(g) + N2O5(g) → 3NO2(g) + O(g) Step 3: NO3(g) + O(g) → ...

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Q: Which of the following substances is most soluble in water?                         W) NH4C2H3O2  ...

A: NH4C2H3O2 is also called as ammonium acetate and it's a salt of weak acid and weak base.

Q: The following mechanism has been proposed for the gas phase reaction of H2 with ICl: H2 (g) + ICl(g...

A: The following mechanism has been proposed for the gas phase reaction of H2 with ICl:   H2 (g) + ICl(...

Q: Question 3 For the reaction below, which species is the oxidizing agent? H26 + Cl2 → 2 HCle O H2 HCl...

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Q: A compound of potassium had the following percentage composition: K 49.44%; H 0.6372%; P 19.58%. The...

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Q: Which of the following molecules represents the lowest energy conformation of trans-1-bromo-4-ethylc...

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Q: H. CN-N H + 2 F2 → 4 HF + N2 H.

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Q: Give the major organic product(s) for each of the following reactions

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Q: Fe + CuSO4 = Cu + FeSO4 Find the ΔG for this reaction SRP: Fe2+ + 2e  E = -0.44          Cu2+ + 2...

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Q: Which of the following statements are true with regards to a supersaturated solution? W) it contain...

A: A solution is a homogeneous mixture which contains solute (less quantity) dissolved in the solvent( ...

Q: A thermodynamically-controlled process describes a reaction that generates the most stable product O...

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Q: III. Problem solving. Show your computations. Answer questions briefly. A 50.0 ml juice extract is c...

A: We are given  A 50.0 mL juice extract is colorimetrically assayed using Nelson's test. One millilite...

Q: A solution is prepared by dissolving 20g of NaCl (f.w.= 58.44 g mol^-1), a nonvolatile solute, in en...

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Q: A chemist prepares a solution of sodium carbonate (Na, CO,) by measuring out 62.5 g of sodium carbon...

A: Given :-  Mass of Na2CO3 = 62.5 g  Volume of solution = 350. mL  To determine :-  Concentration of s...

Q: Which of the following is technically considered a nonpolar covalent bond? A. C – H B. O – N C. P –...

A: we can decide whether the bond is polar or nonpolar on the basis of their electronegativity. If the ...

Q: Calculate the pH of a solution formed by adding 2.00 grams of solid potassium cyanide, KCN, to 180.0...

A: Given,  adding 2.00 grams of solid potassium cyanide, KCN, to 180.0 ml of 0.340 M hydrocyanic acid s...

Q: 6s, 5p, 3d, 4p Rank orbitals from smallest to largest energy

A: • The given orbitals are-          6s, 5p, 3d, 4p    • We need to arrange the orbitals in increasing...

Q: Question 18 Which compounds contain a benzene ring (a phenyl group)? O isopentyl acetate O cinnamald...

A: Compounds that contain benezene ring are Cinnamaldehyde , vanillin, methylsalicylate . but isopentyl...

Q: 1. Determine the following values for a 0.020 m (NH4)CrO4 solution. a. Ionic strength, I (in molalit...

A: Given that : The activity explains the effective concentration of a substance in a given solution. G...

Q: A 7.46 g sample of an aqueous solution of nitric acid contains an unknown amount of the acid. If 25....

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Q: A chemist added 40 ml of pure acetic acid to 100ml of 20% v/v solution of acetic acid in water. What...

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Q: Consider two containers of H2 and CO2 at the indicated temperature, pressure, and volume: H2 CO2 T =...

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Q: What is the concentration after 3 minutes has passed?  a.) 0.0702 b.) 0.0693 c.) 6.421E-4 d.) 0....

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Q: CH3CH2NH2 (с) 2 eq CH3CH2OH (d) H30* (е) -CH2-CH2-C-H КKMnOд, cold dilute

A: The given reactions are some of the well established reactions exhibited by carbonyl functionality.

Q: 4. The following compound undergoes an intramolecular Diels-Alder reaction. Show the mechanism and e...

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Q: 7. Order the following species from smallest to largest size. Ba, Se, Au, Ba2+, Se²-, P A. Se < P < ...

A: Atomic size is defined as the distance between the centre of the nucleus of an atom to its outermost...

Q: Write the electron configuration for barium.

A: Electronic configuration....

Q: In k vs. 1/T (K) 0.0005 d,001 0.0015 -2 -4 y = -30189x + 27.399 R² = 1 -6 -8 -10 -12

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Q: CI OH Agz O

A: The product would be:  

Q: If a 10 mg/mL solution of ovalbumin (mol. wt 42 kDa)  reacts with Biuret reagent, and has an absorba...

A: Formula of Absorbance  is given as : A = e. C. l  Where ,  e = molar absortivity C = Concentration o...

Q: Spell out the name of the compound.

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Q: A chemist prepares a solution of iron(II) bromide (FeBr, by measuring out 56.5 µmol of iron(II) brom...

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Q: In the first step of this process sodium bromide is dissolved in water. It is mentioned that not all...

A: Given data:  The solubility of NaBr = 0.9432 g/mL Mass of NaBr = 78 g Volume = 75 mL

Q: Question 9 Which of the following are a function of the salt bridge in an electrochemical cell? Sele...

A:

Q: How many signals would you expected in the 'H NMR of the following molecules? Br. (a) (b) (c)

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Q: For a particular reaction, AH = 120.5 kJ and AS = 758.2 J/K. Calculate AG for this reaction at 298 K...

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Q: What is Ka for the conjugate acid of NH₃ (Kb = 1.8 × 10⁻⁵)?

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Q: Current Attempt in Progress 2.050 g of an unknown sample contains H, S, and O. If the compound conta...

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Q: What is the expected product of the reaction shown? HBr он Br Br II Br IV O II O IV O none of these

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Q: At a certain temperature the rate of this reaction is first order in NH, with a rate constant of 5.3...

A: Order of reaction = 1 Rate Constant, k = 5.31 s-1  

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.