Two students determine the percentage of lead in a sample as a laboratory exercise. The true percentage is 22.52 %. The students' results for three determinations are as follows: 1. 22.52, 22.28, 22.74 (Student A) 2. 22.64, 22.58, 22.62 (Student B) Calculate the average percentage for each set of data, and state which set is the more accurate based on the average? A. 22.51, Student A B. 22.55, Student A C. 22.51, Student B D.  22.55, Student B

Q: Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your ...

A:

Q: Identify the type of hybridization, refer to the red c-c bonding. * H,C- H.

A:

Q: For 1-5, identify the factor that is affecting the rate of reaction. Use collision theory to explain...

A: Collision theory: It is a theory of chemical reactions. According to this theory, the reactant molec...

Q: draw and explain rhe chemical structure of maillard reaction that is present in cooking ground pork ...

A: The Maillard reaction is a reaction where the reducing sugars react with amino acids to give a compl...

Q: 1. 2. H' H エ エ 3.

A: Note : As per our company guideline we can answer only three subparts. Kindly repost the question me...

Q: Figura 1: Espectro de 1H do reagente desconhecido 1H 3H 2 PPM

A:

Q: Compute the root-mean-square speed of Ne molecules in a sample of neon gas at a temperature of 202 °...

A: Speed can be defined as the distance covered by an object per unit of time. We can also say that spe...

Q: estion 32 Which of the following compounds is a strong electrolyte? O N2OH O H20 O CH3OH O CH3CH2OH

A: 34-answer

Q: Given: A weak acid, HA (whose Ka is 1.00 x 10-6 and Kp is 100) that distributes between benzene and ...

A: To show that the distribution ratio, D, of the acid is a function of the partition coefficient, KD ,...

Q: How does nuclear fission generate electricity? Use the paperclip button below to attac

A:     What is nuclear Energy?  Nuclear energy comes from the binding energy that is stored in the ce...

Q: Calculate the theoretical percentage of water in CoCl3·4H2O (Molar mass of the hydrate is 237.37 g/m...

A: Given :- chemical formula of hydrate = CoCl3.4H2O  Molar mass of CoCl3.4H2O = 237.37 g/mol  To calcu...

Q: A 1.3-mol sample of ideal gas at 23.0°C is allowed to expand reversibly and adiabatically from 400 c...

A:

Q: Calcium carbide (CaC2) reacts with water to produce acetylene (C2H2) as shown in the reaction below:...

A:

Q: A student dissolves 14.1 g of potassium chloride (KCI)in 250. g of water in a well-insulated open cu...

A:

Q: 2. At what temperature will 0.84 moles of neon gas occupy 120 cm' at 1 atmosphere?

A:

Q: What is the pH of 8.3 x 10-3 M HC1? pH =

A: Dear student since you have asked multiple questions but according to guidelines we will solve 1st q...

Q: Calculate [H,O*] for a 8.92 × 10–3 M HBr solution. [H,O*] = M Calculate [H,O+] for a 1.20 x 10-2 M K...

A: Given,  (A).  [HBr] = 8.92 x 10-3 M  [H3O+] = ? (B).  [KOH] = 1.20 x 10-2 M  [H3O+] = ?    

Q: Please note that "geometry" refers to the molecular or ionic geometry. H-N-H A. The Lewis diagram fo...

A: Here we have to determine the elctron geometry and shape of the following chemical species.

Q: C. What kind of chemical reactions can the -NO2 group undergo? What is the expected product? What is...

A:

Q: Abuela asked Mirabel to perform an experiment on freezing point depression. The solution was prepare...

A:

Q: d. Draw the structure of the following heterocycles: 2 3 Naphtha[2,3-b]thiophene 1,6-dimethylphenoxa...

A:

Q: Predict what will happen if nitric acid is added to a solution of [Ag(NH3)2]Cl in NH3 (ag) (Hints: (...

A: When nitric acid is added to a solution of [Ag(NH3)2]Cl in NH3(aq)  Reaction will be as             ...

Q: Please answer both subparts. I will really upvote. Thanks

A:

Q: What is the molarity of ZnCl2 that forms when 25.0 g of zinc completely reacts with CuCl2 according ...

A:

Q: A solution is 1 X 104 M in NaF, Na2S, and Na3PO4. What would be the order of precipitation as a sour...

A:

Q: om Table A-26. Assume the water in the products is in the vapour form.

A:

Q: A scientist proposed the following equation of state: RT p = C + V2 B Vm V3 m Show that the equation...

A: Solution -

Q: 1. Determine the volume of occupied by 0.0123 pounds of carbon dioxide gas at STP. I kg = 2.2 pounds

A: 1) given, Mass of carbon dioxide  (CO2) gas = 0.0123 pound = 0.00559 kg = 5.59 g Converting pound in...

Q: Calculate the concentration of CaH.O42 : a. in a solution which is 0.020 M solution of H2C3H4O4. b. ...

A: Answer: Given acid is the phthalic acid which is a weak organic acid, therefore to calculate concent...

Q: Jackie adds 0.1 moles of HCl to a buffer mixture containing 1.0 mole of NaF and 1.0 mole of HF in 1....

A: HCI is a strong acid. So, HCl reacts to basic NaF from buffer mixture. H* from HCl and F from NaF co...

Q: Balance the following equations and write the corresponding ionic and net ionic equations (if approp...

A: Write the balanced molecular equation  Split strong electrolytes to their corresponding ions to achi...

Q: Which of the following has the highest intensity of mass fragment peak in its mass spectrum? Select ...

A: more the stability of the fragment, more the intensity of the mass fragment peak in the mass spectru...

Q: 20 g of Na2SO4 is dissolved in 60 g in water. What is the %w/w,

A:

Q: Explain in detail the carbon-nitrogen-oxygen fusion chain that occurs in the center of the Sun

A:

Q: which will produce an oxidation product with potassium permanganate that is insoluble in sodium hydr...

A: A question based on solution that is to be accomplished.

Q: Identify the electron pair geometry of selenium hexachloride (SeCl6)

A:

Q: A chemical process occurs at constant temperature and pressure within the cylinder. Reaction 8.0 L 4...

A:

Q: Why condensed tannins are not hydrolysed by HCl?

A: Tannins are phenolic compounds of high molecular weight  capable of precipitation of animal proteins...

Q: C. Draw the chemical structure for each of the following: Ex. 2,3-dimethylpentane CH3 CH3 CH-CH-CH-C...

A:

Q: 4. At temperature 500 °C, what is the volume of occupied 4.2 grams carbon dioxide gas at STP?

A: Number of moles is calculated by dividing given mass with molecular mass.

Q: General reaction using hydroxylamine as test for esters

A:

Q: trans-2-methoxy-5-methylstilbene? Thanks in advance.

A:

Q: In a solution with pH = 2.50, the H3O* concentration is M, the OH concentration is %3D M, and the pO...

A:

Q: A 52.0-mLmL volume of 0.35 MM CH3COOHCH3COOH (Ka=1.8×10−5Ka=1.8×10−5) is titrated with 0.40 MM NaOHN...

A: Given :  1. Concentration(Molarity) of acetic acid = 0.35M. 2. Volume of acetic acid = 52.00mL .    ...

Q: CH;OH НО OH What is the name of this structure? OH OH alpha-D-gulopryranose beta-L-gulofuransone alp...

A:

Q: C. Draw the chemical structure for each of the following:

A:

Q: Given the structure below, to what classification does the amino acid belong to? H2N-CH-C-OH CH2 k O...

A: This is an essential amino acid. Name of amino acid- phenyl alanine. It is neutral and hydrophobic i...

Q: 1. 2.

A:

Q: I621 T 2 Rt Sg Bh 241) Using their positions on the periodic table, rank the following atoms/ions by...

A: When we go from left to right on the periodic table the radius increase and the size increases so Fr...

Q: Experiment 8 Preparation of Cyclohexanone by Hypochlorite Oxidation

A:

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.