How many moles are in a 331.839 g sample of an element with a molar mass of 178.68 g/ mole?

Q: 8. Draw the structures of the conjugate acid and base for the following reaction. Provide the…

A: pKa is inversely proportional to acidity.  So lesser pka, stringer the acid is.

Q: The solubility product for A3B is 2.8 x 10-18, What is the solubility of AgB in water, in moles per…

A:

Q: . Answer the following: a. For n = 4, what is the largest allowed value of (? b. What is the…

A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…

Q: Identify each of the following elementary reactions as unimolecular, bimolecular, or termolecular,…

A: The reactions given are,

Q: 3. Calculate the equilibrium constant of the following reaction: H;S = 2H* + S Knowing that H;S has…

A:

Q: Calculate K. for the following reaction: J+ 2L= JL2given the following data: J+L= JL Kc = 3.2 × 10-4…

A: Chemical equilibrium is defined as stage at which rate of forward reaction become equal to rate of…

Q: O On a reaction with acid, 4-pyrone is protonated on the carbonyl-group oxygen to give a stable…

A: The product is stable  due to Aromaticity  in the product. AROMATIC  PRODUCTS ARE STABLE.

Q: 3. What fragments would you expect to see in the following molecules a. Pentanol b.…

A: According to the guidelines of Bartleby, we are supposed to answer only the first 3 sub-parts of the…

Q: Calculate the equilibrium constant K for the following reaction at 25°C from standard electrode…

A:

Q: 4. Provide an adequate route (reaction scheme) for the following reaction HO HO

A: ->First of all there occur elimination reaction and alkene formed. ->Alkene give antimorvnikov…

Q: Determine the amount of energy necessary to raise 489 g of beryllium by 513 degrees Celsius. Report…

A: Given data,Mass of Beryllium=489gTemperature change (∆T)=513oCStandard data taken from…

Q: 9. For each pair of molecules, circle the stronger base. Use pKa values to guide your decisions. a.…

A:

Q: CH4 + 2 H2O ! 4 H2(g) + CO2(g) How many liters of hydrogen can be produced from the reaction of 80.0…

A: Given :-  CH4 + 2H2O → 4H2 + CO2  Mass of CH4 = 80.0 g  Mass of H2O = 16.3 g  To determine :-…

Q: What is the molecular formula for the alkane shown in the model? Express your answer as a chemical…

A:

Q: 2. What is the mass ie of a piece of magnesium wire that produces 40.2 ml of hydrogen gas collected…

A: The reaction of Mg with water is as:-  Mg(s) + H2 O (l) ----> MgO(s) + H2(g)

Q: Cr207 2- (aq) + NO2 - (aq) → Cr 3+ (aq) + NO3 - (aq) The unbalanced equation for an…

A: Detail description is given below

Q: Molecular Geometry 1. NCl₃ 2. CCl2F2 3. CH2F2 4. CH2O 5. HNC

A:

Q: NaNO3(aq) + H20(1) → NO(g) + O2(g) + NAOH(aq)

A: Here the elctrosysis of NaNO3 is done by passing 90A current for 77.2 minutes. We have to determine…

Q: QUESTION 33 A0.863 M solution of a weak acid HA, is 9.72% ionized. What is the pH of the solution?

A: Here we are required to find the pH  of the weak acid HA which is 9.72% and having concentration…

Q: solute in the mixture. unight of heavy molecule. Pure insulin, n was measured at

A: On adding a non volatile solute to a pure solvent, vapour pressure of solution decreases. This is…

Q: Specify the indicator used when titrating 0.1 M with NaOH solution Choose one answer: a. eryochrome…

A: The given question discusses about the proper choice of indicator based on the nature of base and…

Q: If the standard reduction potential of Br, is 1.07 V whereas that for Cl, is 1.36 V, what is…

A: Voltaic cell :-  The apparatus which is used to convert the chemical energy of a spontaneous redox…

Q: Write down structures of dipeptides produced upon condensation reaction between amino acids below.…

A: When dipeptide is given then number of peptide bond is 1... When tripeptide is given then number of…

Q: Which of the following combination has the slowest esterification reaction rate? 1. CH3CH2CH2COOH IL…

A: Correct option is II & IV

Q: Correct the following sets of quantum numbers in an atom? (a) (1, 0, ½, ½) (b) (3, 0, 0, +1/2) (c)…

A: The sets of quantum numbers given are,

Q: T → T molecule? 243 nm |1,3-cyclohexadiene 254 nm [ Select ] 288 nm [ Select ] 315 nm [ Select ] 357…

A:

Q: Solid potassium metal can be produced by the electrolysis of molten potassium chloride (KCI). How…

A: Given - i=5.00amp Weight of solid potassium=61.2g

Q: A Оз Zn/CH3COOH Br2 F H20 H2 > B Pd C2 HCI H* H20 D

A:

Q: Determine the oxidation number of Cu in Cu2O. Link to Physiral Con

A: Given :- chemical formula of compound = Cu2O  To determine :- oxidation no.of Cu in Cu2O

Q: At a certain temperature, the equilibrium constant, K., for this reaction is 53.3. H,(g) + I,(g) = 2…

A:

Q: A solution has a hydrogen ion concentration of 5.1 × 10⁻⁵. Calculate the pOH of the solution. Please…

A: pH :-  The negative logarithm to the base 10 of hydrogen ion concentration expressed in mol/L of a…

Q: Which of the oxidation numbers below is not utilized for sulfur in the following molecules/ions:…

A: The oxidation state of S in Na2S is -2 SO42- is +6 S8 is 0 SBr2 is +2 K2SO3 is +4

Q: Draw the three neutral-species of fluorescein (quinonoid, lactone, zwitterion)

A: p-quinoid, lactone and zwitter ion are the three neutral species of fluorescein.

Q: Draw all possible ways by which the following two molecules can form hydrogen bonds with each other:…

A: The molecules given are HF and .

Q: The following initial rate data are for the reaction of mercury(II) chloride with oxalate ion: 2…

A: We have to predict the rate equation and the rate constant value.

Q: What will be the solubility of Fe(OH)3 (Ksp = 1.6 × 10–39) in: a. 0.0250 M FeCl3 solution? b. a…

A: a) Given: Ksp = 1.6 × 10-39  And concentration of FeCl3 = 0.0250 M Since FeCl3 is a completely…

Q: Determine the partial molar volume of a component of a gas mixture based on the provided equation of…

A:

Q: 9. Count the electrons in the following complexes and determine the oxidation state of the metal. a.…

A: Organometallic is branch of chemistry in which we deal with metal carbon bond.

Q: -9 at 25 C. Calculate the [OH ] in a 0.10 M solution of pyridine at this temperature. Pyridine…

A: Here we are required to find the concentration of hydroxide formed when weak Base pyridine…

Q: Which of the following salts is more solubility in an acidic solution than in a neutral solution?…

A: Caso3 and na2so4 is more soluble in acidic medium than water

Q: Definition of hexane isomers

A: Isomers are those which have same molecular formula but different structural formula.

Q: Which of the following is a possible surface contaminant that can be carried through surface…

A: Interpretation- We have to tell in the following given option that what's the possible surface…

Q: Which of the following salts is more solubility in an acidic solution than in a neutral solution?…

A:

Q: 1. Et,NH 2. ACONH,*

A:

Q: Write the word equations as chemical equations and balance them. Label the reactants and the…

A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…

Q: How many valence electrons are in ClO -1

A:

Q: 9. Using cyclopentanone as your starting material, and using any other reagents of your choice,…

A: The steps involved in the given transformation are 1. Abstraction of proton by base 2. Nucleophilic…

Q: TFA CHo Clz

A: We have to give the reaction mechanism.

Q: A mixture of 0 12 M NH C1 and 0.246 M NH4OH has volume of 20 mL, calculate its Ph volume 1 ml of 1 M…

A: Here we have to determine the pH Change when 1ml of 1MHCl and 1ml of 1M NaOH is added separately in…

Q: · A new compound A2B has been discovered and has the following properties: a) it is solid at room…

A: Here we are required to find the nature of the new compound A2B

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.