A compound contains carbon, oxygen, and hydrogen. Analysis of a sample showed that it contained by mass 68.9% carbon and 4.92% hydrogen. What is the simplest formula for this compound? O A. C7H8O O B. C6H4O3 OC. C8H6O2 OD.C7H602

Q: Which of the following is/are TRUE about Galvanic cell? I. The Gibbs Free Energy of the cell is nega...

A: A Galvanic cell is an electrochemical cell, in which the chemical energy is converted into electrica...

Q: The standard cell potential for the reaction at 298.15 K: Fe (s) + Zn2+ (aq) ⇋ Fe2+ (aq) + Zn (s) i...

A:

Q: Exactly 1.0 mol N204 is placed in an empty 1.0-L container and allowed to reach equilibrium describe...

A: Intial mole of N2O4 is 1mol. Vol. Of container is 1L. Given equation: N2O4(g) <-----> 2NO2(g).

Q: The Tietjen and Moore paper gives the following set of 8 mass spectrometer measurements on a uranium...

A:  

Q: It is often possible to change a hydrate into an anhydrous compound by heating it to drive off the w...

A: Given: Mass of KF hydrate i.e. KF·nH2O = 31.43 g. And the mass of anhydrous KF after heating = 19.40...

Q: Which of the following conclusions concerning the concentration-time plot provided below is/are corr...

A: Chemical kinetics is branch of chemistry in which we deal with rate of reaction.

Q: 24) Identify the type of Organic compound shown 애

A: In the given structure carbon atom is bonded to oxygen atom by a double bond and a hydroxyl group (-...

Q: When 6 moles of H₂ reacted with 3 moles of N₂ to produce, NH₃, which is the limiting reactant? *

A: Answer: In chemical reaction, limiting reagent is the reactant that exhausted first and decided the ...

Q: The cell notation for the Galvanic cell is The Standard Reduction Potential are as follows: E°ca2*/c...

A: The cell given is Cd(s) | Cd2+ || I2 (s) | I-.  

Q: Other things being equal, the margin of error of a confidence interval increases as A the confidence...

A: The margin of error, also known as the confidence interval, indicates how closely your survey result...

Q: Consider the following reaction. cat. ACOH el H2N-NH2 Toluene (reflux, remove H2O) a. Draw a reasona...

A:

Q: Ketones are able to be the substrate of a reduction reaction.  Furthermore, ketones also are able to...

A: Answer: In this statement, it is being mentioned that, oxidation of ketone  can be performed and red...

Q: It is possible to ignite diethyl ether at temperatures lower than +35 degrees Celsius. True or Fals...

A: Complete solution is given below in next step   

Q: Which of the following changes will affect the rate constant of a reaction 1. Increasing or decreasi...

A: The rate constant is affected by  1) increasing or decreasing the reaction temperature

Q: How many grams of CuCl2 (MW = 134.45 g/mol) is needed to prepare 100.0 mL of 0.2418 M CuCl2?   3.07...

A:

Q: Consider the following natural fatty acids. Of these, which is predicted to have the LOWEST melting ...

A: To identify: The fatty acid with the lowest melting point.  

Q: 22. Write the chemical equation and the equilibrium constant expression K, for the following bases i...

A: The bases given are,  

Q: Which of the following describes an electrolytic cell? The energy is transformed from chemical to el...

A:                                     Answer An electrolytic cell electrical energy convert into chemi...

Q: Which of the following is a correct practice in handling reagents? A Return any excess reagent to it...

A: Since you have posted multiple questions, we are entitled to answer the first only. 1) The options g...

Q: Question 22 At 2000 °C, N2(g) + O2(g) → 2 NO(g); Kc = 4.10 x 10-4 What is Kp for this reaction? O 7....

A:

Q: For the following process, determine the change in entropy for the system (ASsys), the surrounding (...

A:

Q: Wine goes bad soon after opening because the ethanol (CH,CH,OH) in it reacts with oxygen gas (0,) fr...

A:

Q: At a certain temperature the rate of this reaction is first order in H,PO, with a rate constant of 6...

A:

Q: Question 18 The cell notation for the Galvanic cell is Cd(s)/Ca2*M2(s)/I" The Standard Reduction Pot...

A: This is a redox reaction. In this reaction, Cd oxidised to Cd2+ and I2 reduced to I- .  Using Nernst...

Q: Bromination of an alkene by N-bromosuccinimide (NBS) in the presence of light or peroxide is a radic...

A: The reaction given is,  

Q: I. Directions: Draw the lewis structures of the neutral atom and the ion of each element. Determine ...

A: Lewis structure is the representation of molecules or atoms with valance electron

Q: The reaction between selenous acid and the iodide ion in acid solution is H2SEO3(aq) + 61 (aq) + 4H*...

A: We have to predict the increase in rate of reaction.  

Q: What is the purpose of the salt bridge in an electrochemical cell? To maintain electroneutrality To ...

A: Given : We have to tell the purpose of salt bridge in an electrochemical cell.

Q: A 30.0030.00 mL Ba(OH)2Ba(OH)2 solution of unknown concentration was neutralized by the addition of ...

A:

Q: Br 1. PPH3 2. n-butyllithium H. 3.

A: Wittig reaction is the reaction which is used to produce alkene by the help of carbonyl compound. Tr...

Q: Which of the following is not a way of expressing data reliability:   Statistical Tests   Sampling...

A: A question based on tools in analytical chemistry that is to be accomplished.

Q: After carrying out the following operations, how many significant figures are appropriate to show in...

A: We have to predict the number of Sig figs in result.  

Q: What is the cell potential for the following reaction at 25 °C?  Ni(s) + Cu2+(0.010 M) → Ni2+(0.001...

A: Given, Ni(s) + Cu2+(0.010 M) → Ni2+(0.0010 M) + Cu+(1.0 M) SRP: E° Ni2+/Ni = -0.25 V; E° Cu2+/Cu+ = ...

Q: 1. For the following questions determine what error would be introduced in the value for the calcula...

A: The solution is as follows:

Q: A chemist obtained the following data for the percent compound Z in triplicates (n=3) of an insectic...

A: Data obtained by the Chemist:- The percent compound Z in triplicates (n=3) of an insecticide prepara...

Q: a solution that is 0.21 M in HCHO2 and 0 13 M in NaCHO2 (K.(HCHO2) = 1.8 × 10 4) Express your answer...

A:

Q: Which of the following is the best option for transferring 20 mL of a solution? A Use a 10 mL Mohr p...

A: Correct option C 

Q: when 15.00 mL of 2.00 x 10^-6 M lithium sulfate is mixed with 17.00 mL of 1.00 x 10^-6M sodium phosp...

A: Given: Concentration of lithium sulfate i.e. Li2SO4 = 2.00 × 10-6 M Volume of Li2SO4 solution = 15.0...

Q: Sulfur dioxide combines with O2 in the presence of a catalyst as represented by the equation 2SO2(8)...

A:

Q: Phosphorus and bromine react to form phosphorus tribromide, like this: PĄ(9) + 6 Br,(9) → 4 PB13(9) ...

A:

Q: After taking measurements of a rectangular solid with a mass of 3.84g, you determined the length to ...

A:

Q: Which of the following pairs is incorrectly matched?

A: Option D

Q: Relate the properties of water in the following: a. Water as a solvent in plant nutrition b. High ...

A:

Q: Which of the following statement/s is/are TRUE? I. When electricity is passed through a solution con...

A: There are different types of reaction taking place. Some reaction takes place spontaneously, while s...

Q: For the reaction Br2(g) + Cl2(g) 2BRCI(g), at equilibrium, it is found that the concentrations of Br...

A: Here given [Br2]=0.398 M, [Cl2]=0.351M, [BrCl]=2.05×10-5M FFrom the given equation Kc=[BrCl]2/[Br2][...

Q: 5. Determine the concentration in mol/L (M) of a solution of 18.25 g of HCl in 250.0 mL of water and...

A:

Q: 1.10 M Acetic acid 0.900 M Sodium acetate [H30*1 (M) Solution (mL) |(mL) 1 8.00 2.00 8.71e-5M 7.00 3...

A: Here we have to determine [H3O+] concentration in mixing the following volumes of 1.10M acetic acid ...

Q: Francis A. Santos Which of the following chemical grades are specially manufactured, have exceptiona...

A: Which of the following chemical grades are specially manufactured, have exceptional purity and used ...

Q: What is the appropriate size of volumetric flask to use if you want to dilute a 75.00 mL solution of...

A:

Q: Question 12 Which of the following is/are TRUE about molar conductivity? I. The molar conductivity p...

A: The conductance is the ease with which the electron are free to move about.

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.