Note : Answer Four Questions Only O 1: A-Calculate the number of moles and density of ammonia which has (5x 103) molecules at standard temperature and pressure? B- Distinguish between metal ion and oxygen concentration cells ?

Q: O The chemical reactior Of a lead Stocage batt fallow ing equatlon, Hou 8og of Pb, gog o Solution of…

A:

Q: the solutions are additive and that Kp = 4.4 x 104 for methylamine.

A: The question is based on the concept of EQUILIBRIUM. we have to calculate pH of the solution…

Q: The electrical conductivities of the following 0.100 M solutions were measured in an apparatus that…

A:

Q: What is the concentration of Ba(OH)2 prepared by dissolving 13.5 g of BalOH)2 in water to give…

A:

Q: What volume (in L) of 1.2 M FeCl2 would be required to obtain 0.85 moles of CI- ions?

A: The molarity of a solution is calculated using the following expression,…

Q: How many grams of Na2S2O3 are needed to prepare 87.0 mL of a 5.00 %(m/v) Na2S2O3solution?

A: Percentage mass by volume is defined as moles of solute per 100 mL of the solution and it can be…

Q: You have 6 mL of cells you need to treat with Hydrogen Peroxide (H2O2), such that the final…

A: A question based on volumetric analysis for which the required volume of H2O2 from the stock is to…

Q: The concentration of SO2 is 0.5 ppm. Calculate the equivalent concentration in μg/m^3 at standard…

A: Concentration of pollutants in air can be measured in unit of ppm or ppb

Q: What is the percent (m/v) concentration of the solution obtained when 15.2 grams of nickel (II)…

A: Given: mass of nickel nitrate=15.2 gvolume after dilution=1.5 L…

Q: What mass of solid Ca(OH)2 is required to prepare 100.0 mL of a 0.250 M Ca(OH)2 solution? Also, give…

A: Number of moles of calcium hydroxide = Concentration of calcium hydroxide (M) × Volume of solution…

Q: Calculate the (W/V%) of Ca(OH)2 solution that its molar concentration (0.2 M) and dissolved a 200 ml…

A:

Q: What is the percent by mass of a solution made by dissolving 0.500 kg of solute in 2.50 kg of solven…

A: Given : Mass of solute = 0.500Kg  Mass of solvent = 2.50Kg

Q: 6 How would you prepare 2.5 L of approximately 0.0600 M 13 solution? Calculate the molar…

A: Introduction to Molarity The total number of moles of solute in a given solution's molarity is…

Q: What is the percent (m/v) concentration of the solution obtained when 15.2 grams of nickel (II)…

A: Mass by volume (m/v) percentage: It is defined as the mass of solute dissolved in 100 mL of the…

Q: can volumetry or electrogravimetry be used to measure lead concentrations in water?

A: Volumetry or volumetric analysis is a technique that is used tp determine the amount of substance…

Q: How many grams of calcium hydroxide, Ca(OH)2 are required to neutralize 43.26 milliliters of 0.550 M…

A:

Q: The wall of a glass beaker contains ≡Si-OH groups. Why are dilute solutions of metal ions (pH > 7)…

A: Given: The wall of a glass beaker contains Si-OH groups.

Q: Gases are more soluble in cold water. Which ocean waters do you think have the highest…

A: Gases dissolve at a higher rate in cold water. This phenomenon is widely used in the preparation of…

Q: 4- Describe the preparation of 200 mL of 3 F H2SO4 from the concentrated solution which is 95% (w/w)…

A: Given , Concentrated 95%(w/w) H2SO4 solution  It means , 95 grams of H2SO4 is present in 100 grams…

Q: Will the following reaction take place? Explain. NaBr(aq) + F2(1)>

A: Given that : We have to identify whether or not the following reaction takes place.

Q: Write the balanced equation if Vitamin C is oxidized by I2. That was generated by mixing KIO3 and KI

A: A chemical technique which can be used for the determination of amount of compound present in a…

Q: What is the molarity of a 3.00% (m/v) solution of C13H18ClNO?

A: Since %(m/v) is defined as  % (m/v) = mass of solute in g X 100 / volume of solution in mL Assuming…

Q: How many grams of potassium hydroxide, KOH , are required to make a 4.77 %(w/v) aqueous solution in…

A: Given :- % w/v = 4.77 %                Volume of solution = 250 mL  To calculate :- mass of KOH (in…

Q: What is the molarity of a solution in which 150.0 grams of iodine, I2I2, are dissolved in rubbing…

A: Given: The mass of iodine (I2) = 150.0 g The volume of alcohol = 500.0 mL = 0.5 L The molar mass of…

Q: Calculate the number of moles of sulfuric acid that is contained in 0.250 Litros of 2 M sulfuric…

A:

Q: What is the normal boiling point of 1.21 M solution of CaI2 that has a density of 1.92 g/ml? (Kb for…

A: Solution is made up of two components which are solute and solvent. Solute is present in the minor…

Q: What are the molarity of solutions 85.0% H, PO, specific gravity 1.689, F. wt 98 g / mol

A: The question is based on the concept of solution preparation. we have been given a stock solution of…

Q: At 10°C, how many grams of NaNO3 can be dissolved in 380 g water?

A: The given graph is plotted between solubility and temperature. Solubility represents the amount of…

Q: Calculate the molarity of KI in a 400 mL solution of tincture of iodine if the solution contains 5%…

A: Molarity is defined mathematically as follows:Molarity=molevolume in litre unit

Q: Describe the steps you would use to separate a mixture of solid Mg(OH)2 and BaSO4 from each other.

A: Chemical reaction- It consists of reactant (starting material) and products (substances formed in…

Q: What is the concentration of sodium ions in 0.300 M NaNO₃?

A: Given Information: Concentration of NaNO3 =0.300 M To find: Concentration of sodium (Na+) ions

Q: Choose the substance that is classified correctly? O CrCl3 is a basic salt in aqueous solution O…

A: Salt of strong acid strong base is neutral in aqueous solution.  Salt of strong acid weak base is…

Q: What are the two primary chemical species present in a 1.0M aqueous solution of ethanol and are…

A: The homogeneous mixture of two or more substances is known as a solution. The solution is made from…

Q: 15. Calculate the amount of chemical required in each case to make up the volume indicated to the…

A: Molarity: In chemistry, the strength of a solution is called its concentration. This value gives an…

Q: Express the concentration of Na2S2O3 in terms of mole Na2S2O3 in grams of solution

A: Mass of Na2S2O3 = 4.06 g Mass of Solution= 27.1 g Molar mass of Na2S2O3 = 158.11 g/mol

Q: Describe how we can prepare 250 ml of 500 ppm Na* from Na2CO3?

A: The solution is shown below.

Q: The concentration of glucose in blood is usually about 0.11% (m/v).  If 7000.0 mL of blood are in an…

A:

Q: How many grams of sodium carbonate must be weighed out in order to make 2.5 kg of a 35.0% (w/w)…

A: Percentage w/v gives the information about the number of grams of substance is in 100 mL of the…

Q: Describe the preparation of the following solutions. show all calculations. a.) 100mL of 0.5N NaOH…

A:

Q: How many grams of Na2S2O3 are needed to prepare 50.0 mL of 5.00%(m/v) NaS2O3 solution?

A: Given: Mass-volume % of Na2S2O3 = 5.00%(m/v) total volume = 50.0 ml

Q: What is the molality of lithium ions in a 0.302m solution of li3po4 assuming the compound…

A: Given: Molality of Li3PO4 = 0.302 m

Q: Write C if Statements a and b are correct H if both statements are incorrect E if only statement A…

A:

Q: 5) What mass of lead(II) bromide, PbBr2, (rounded to 100th of a gram) çan be dissolved to create a…

A:

Q: percent (w/v) concentration

A:

Q: How would a student make 0.500 mL of a 0.05000 M solution of iron (III) using a stock solution that…

A:

Q: What is the molality of lithium ions in a 0.302 m solution of Li;PO, assuming the compound…

A: