Q1/ What weight of pyrite ore (impure FeS2) must be taken for analysis so that the BaSO, precipitate weight obtained will be equal to one-half that of the percent S in the sample?

Q: Determine the molar concentration of a Ca(OH)2 solution whose pOH is 3.47 at 25.0 °C. (the answer sh...

A: To calculate molar concentration of Ca(OH)2 , we would first calculate concentration of OH- using th...

Q: With respect to EMF series, indicate the easiness with which the following metals can be cathodicall...

A: Here using the standard reduction data of metal from electrochemical series we can determine the eas...

Q: reconstruct the peptide sequence. M, 1-Letter Residue 71.0786 R. 156.1870 114.1036 115.0884 103.1386...

A: Solution: The polypeptide chain from N- to C- terminus is as follows.

Q: How many moles of carbon in 70.43 grams of C6X12Y4? (Assume the molar mass of C6X12Y4 is 295.8)

A: Mole concept: The number of molecules or atoms present in the one mole of the substance is equal to ...

Q: can u help me tell wether cis-trans isomers exist in each case. If they do, can u draw the structur...

A:

Q: Question 9 of 20 Submit CI o-CH3 :0: CI :0-CH3 A) bimolecular elimination B) nucleophilic eliminatio...

A:

Q: In a FRET experiment designed to monitor conformational changes in T4 lysozyme, the fluorescence int...

A:

Q: Place the following in order of increasing acid strength. HlO < H1O 2 < HlO 3 < HlO 4;

A: Place the following in order of increasing acid strength ---

Q: Morphine (C17H1903N) is very effective at relieving intense pain. Calculate the pH of a 0.00115 M so...

A: Concentration of morphine = 0.00115 M  Value of Kb = 8.0 × 10-7   

Q: The equilibrium constant, Kp, is 79.9 at 2500 K for the following reaction: XY2(g) + XZ2(g) = 2 XYZ(...

A: ICE table of Reaction                 XY2 (g) + XZ2 (g) →2 XYZ (g)  Initial      0               ...

Q: What is the cell potential for the following reaction at 298.15 K?  Y(s) + Z2+(0.010 M) → Y2+(0.001...

A: To calculate the cell potential, we have to first calculate the standard cell potential.  E° = Ered ...

Q: The equilibrium constant is equal to 5.00 at 1300 K for the reaction: 2 SO2(g) + O2(g) = 2 SO3(g) If...

A: Answer - The correct option is (e) Solution -

Q: 1. If 25.00 mL of 0.100 M AgNO, is mixed with 25.00 mL of 0.300 M NaCN, find (Ag*], [Ag(CN)2], and [...

A:  Volume of AgNO3 = 25 ml      [ AgNO3] = 0.1 M Volume of NaCN = 25 ml      [ NaCN ] = 0.3 M  Kf  of ...

Q: History of Cosmetics

A: In this question we have to explain that the historical timeline about the development of cosmetics ...

Q: Which of the following is the conjugate acid of H2PO4 ? OA HPO42- O B. HPO4 ОС НЗРО4 ODPO43-

A: Conjugate acid is the chemical species which formed when a base accept a proton.

Q: Question sU For the reaction, X= 2Y, If 0.5 moles of Y and 4.0 moles of X are introduced into a 2.00...

A: Answer:-             Determined Kc for the given reaction by             using ICE table .

Q: D. What is the hybrid orbital of each of the molecules/ ion in the preceding item (C)? For # 5 & 6, ...

A: Hybrid orbitals can be defined as the orbitals that are formed by mixing of two or more  atomic orbi...

Q: conclusion about this experiment written on past tense form

A:  As your question does not include much more. but anyway one thing is very clear that conclusion is ...

Q: Five samples of helium gas are described in the table below. Rank the samples in order of increasing...

A: Here we are provided with the 5 sample of helium at different temperature and different amount of he...

Q: QUESTION 5 (10 blanks) If the gravitational potential energy of the water is equal to the increase i...

A:

Q: Draw the following in a short bond paper. Please attach your final answer to this document 1. 2,3-di...

A:

Q: 10.5. Write the equations for the following induced nuclear reactions: 4? 75A 200 e) 4? (a, p) 2Ti d...

A: 10.5.  n ( α, p) type nuclear reaction, a nucleus (  AzX ) reacts with an α particle ( 42He )and pro...

Q: . For each of the numbered bond in the following molecule, 5 |10 3 8. a. identify the orbitals overl...

A: To determine type of orbital overlapping and type of bond in the molecule.,  

Q: Phosphoric acid (H3PO4) can be prepared from phosphorous triiodide (PI3) according to the reaction: ...

A: Given reaction is : PI3 (s) + H2O(l) → H3PO4 (aq) + HI(g)  Mass of PI3 (s) = 15 g  Volume of H2O = 2...

Q: For the following reaction, 27.7 grams of hydrochloric acid are allowed to react with 68.8 grams of ...

A:

Q: II. Answer the following items as required. A. For the following sets of atomic orbitals: 1. s+ px 2...

A: When 1 lobe interact with 1 lobe, sigma bond form. When 2 lobe interact with 2 lobe, pi bond form.

Q: An aqueous solution of barium hydroxide IS standardized by titration with a 0.164 M solution of hydr...

A:

Q: Draw a heating curve when octane, a component of gasoline, is warmed from -70 °C to 130 °C. It has a...

A:

Q: Give the molecular geometry of the following compound

A: Molecular geometry can be defined as the three-dimensional arrangement of atoms in a molecule. It is...

Q: Directions: Use the cooling curve below to answer the following questions. 130 130 IV 30 10 40 10 e ...

A: NOTE: Since you have posted a question with multiple sub-parts, we will solve first three subparts f...

Q: This is the chemical formula for talc (the main ingredient in talcum powder): Mg;(Si,Og),(OH), An an...

A:

Q: Calculate the value of AH for the reaction: 3 Fe (s) + 4 H20 (g) Fe304 (s) + 4 H2 (g) Fe (s) + H20 (...

A:

Q: Calculate AH for the reaction: 2 H2 (g) + 2 C (s) + + 02 (g) C2H5OH (1)or + 2 H2O (1) C2H5OH (1) + 2...

A:

Q: For a given pure metal which of the following cubic unit cells would result in the highest metal den...

A: Complete solution is given below in next step

Q: Hydrolysis Place 1 mL of tert – butyl chloride in a test tube and add 5 mL of dilute NaOH solution. ...

A:     As per the guideline, since you have asked multiple questions, we have solved the first question...

Q: a. Find the average position on the x-axis, , for the wavefunction of a 2D particle in a box where Y...

A: Formula to calculate average value of position is 

Q: For the following reaction, 3.91 grams of sulfuric acid are mixed with excess barium hydroxide. The ...

A:

Q: Cd is a heavy metal that leaches at a rate of approximately 0.0012 milligram/liter per year. Conside...

A: This question is better solved by using dimensional analysis concept. It is given that  rate of leac...

Q: How many atoms are there in a body-centered cubic unit cell of rubidium? а. 4 b. 8 О с. 1 d. 6 Ое. 2

A:

Q: A titrant of 1.0 M K2Cr2O7 was used for titration of 30 mL aqueous ethanol C2H6O solution and consum...

A:

Q: A sample of feldspar weighing 1.500g is decomposed, and eventually there is obtained a mixture of KC...

A:

Q: Use the van't Hoff Equation constant to determine the Delta H rxn for the following equilibrium reac...

A: Vant's Hoff equation help us in prediction of enthalpy change of a reaction and value of an equilibr...

Q: Which two species act as the bases in the following reaction? HPO42-(aq) + NH4*(aq) 2 H2PO4-(aq) + N...

A: According to Bronsted-Lowry concept,  Acid is a substance that has a tendency to donate a proton to ...

Q: A metal crystallizes in a face-centered cubic lattice. The radius of the atom is 196 pm and the dens...

A: A face-centered cubic lattice contains atoms present at the face and at the corner of the lattice. E...

Q: C Energy A Reaction Progress --> ---- -

A: Activation energy, the minimum amount of energy that is required to activate atoms or molecules to a...

Q: Can this molecule have resonance structures? How do I draw them?

A: Yes, carboranes can be written in the form of boranes which its resonating structure.

Q: Calculate the solubility in g/100 mL of the AgI in 0.10 M NH3. The NH3 concentration is that of unco...

A: Given data: 0.10 M NH3, Ksp of AgI = 8.3 x 10-17 To find- solubility of AgI

Q: How would you synthesize the following compounds from butanoic acid using reagents from the table? U...

A:

Q: Place the following substances in an INCREASING order based on the expected PH concentration). So "1...

A: Expected pH in increasing order 1) HCl (Lowest pH) 2) H2Se 3) H2S 4) SO32- 5) CsOH (Highest pH) HCl ...

Q: 3. What is the final temperature of 100 g of ice at -5 °C added to a styrofoam cup filled with 2500 ...

A: