A suspension was prepared by mixing spherical gum grains with a density of 1.206 gcm-3 and a radius of 0.212 μm and water with a density of 0.999 gcm-3 at 15˚C. Since the number of particles determined microscopically at 5 μm and 35 μm heights from the base is 100 and 47, respectively, in the same time, calculate Avagadro's constant (g= 9.8 m s-2, μm= 10-6 m)

Q: A solution is known to contain 38.04 ± 0.03 mM KCl, and you have taken an aliquot of this solution…

A: Concentration of KCl = Volume of KCl = The number of moles can be determined using the equation,…

Q: 13. (d) Pharmacists sell tablets containing magnesium hydroxide, Mg(OH),, to combat indigestion. A…

A: Given that: Volume of HCl = 32.00 cm3 Molarity of HCl = 0.500 mol dm–3 HCl Mass of tablet = 500mg…

Q: You have a method that requires you to make a solution of disodium hydrogen phosphate (Na2HPO4). It…

A:

Q: Consider the following reaction: 2 NO (g) N2 (g) + O2 (g), Kc = 4.0 You start the…

A: Given; The reaction is as follows; 2NOg⇌N2g+O2g........................KC=4.0 The volume of the…

Q: Although other solvents are available, dichloromethane(CH₂Cl₂) is still often used to “decaffeinate”…

A: Solubility of caffeine in CH2Cl2 is 8.35 times of H2O. a) Volume of cola = 100.0 mL Amount of…

Q: A student creates a calibration plot for serial dilutions of Cu(NO3)2. A graph of concentration in M…

A: (a) y = 0.345x -0.11 Absorbance = y = 0.655 0.655 = 0.345x -0.11 x = 2.22 M   (b) Molarity = Mass %…

Q: A 0.5008-g sample that assayed 95.9% Na2 SO4 required 48.40 mL of a barium chloride solution.…

A: Given: Mass of Na2SO4 sample = 0.5008 g. Percent by mass of Na2SO4 in sample = 95.9 % And volume of…

Q: A solution of 75 mM tartaric acid (CaH,O6) in water is used as a standard in HPLC analysis. How many…

A: We know that 1 molar solution stands for 1 mole solute is dissolved in 1 litre solution.  Now, we…

Q: A 1.407 g sample of canned tuna was analyzed by the Kjeldahl method. The liberated NH3 required…

A:

Q: e the molarity (M = moles/L) of the NaOH solution to the correct number of significant figures. %3D

A:

Q: By pipet, 15.00ml of the stock solution of potassium permanganate (KMn04) that was prepared by…

A: Mass of KMnO4 = 13.0 gm, Molar mass of KMnO4 = 158.034 gm/mol Number of moles of KMnO4 =

Q: Aqueous solutions of 16.7% by mass hydrogen peroxide, H202 (molar mass =34.016 g mol1) are used to…

A: Given that: Mass percent of H2O2 = 16.7% Density of solution = 1.06 g/mL

Q: 50.00 cm3 of a 1.5784 mol.dm-3 solution of potassium hydroxide is transferred to an empty 700.00 cm3…

A: Given: The initial concentration, (C1)=1.5784 mol.dm-3 The initial volume, (V1)=50 cm3 The final…

Q: A water contains 50.40 mg · L−1 as CaCO3 of carbon dioxide, 190.00 mg · L−1 as CaCO3 of Ca2+ and…

A:

Q: In a titration, 15.5 g of oxalic acid was dissolved in a flask and neutralized with 31.2 mL of NaOH.…

A: Solutions In a titration, 15.5 g of oxalic acid was dissolved in a flask and neutralized with 31.2…

Q: A 0.4000g sample that assayed 96.4% Na2SO4 required 41.25 mL of a barium chloride solution.…

A:

Q: 1. A 15.67 g sample of a hydrate of magnesium carbonate, MgCOs, was heated, without decomposing the…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

Q: Example 14.1 Write the rate expressions for the following reactions in terms of the disappearance of…

A:

Q: A 25mL volumetric pipet is used to deliver a sample of the stock solution marked “0.6000M X2SO4”…

A: Given : concentration of X2SO4 stock solution = 0.6000 M Volume of stock solution used = 25 mL And…

Q: Ammonia reacts with hypobromite, OBr- as follows: 2NH3      +    3OBr-    →    N2  + 3Br-  + 3H2O…

A: Molarity is defined as total number of solute present in 1000 ml of solution . For neutralisation we…

Q: In this experiment, a series of solutions are prepared by combining multiple components into a…

A: We make use of the concept of concentration in this question. We proceed as follows-

Q: A biochemist carefully measures the molarity of calcium carbonate in 62. mL of photobacterium cell…

A: Given: The initial molarity of calcium carbonate is 67.0 μM. The initial volume is 62.0 mL. The…

Q: Sodium carbonate is a reagent that may be used to standardize acids in the same way. In such…

A:

Q: Chemistry Tutorial 2. (Based on Lime- soda process of water softening) Q1. Calculate the amount of…

A: According to the given information,…

Q: Standardization of a sodium hydroxide (NAOH) solution against potassium hydrogen phthalate (KHP)…

A:

Q: How many milliliters of 0.05 M EDTA are required to react with the calcium and magnesium in a 0.1414…

A:

Q: 2 When corn is allowed to ferment, the fructose in the corn is converted to ethyl alcohol according…

A: During the fermentation of corn, ethyl alcohol is produced from the fructose. The amount of products…

Q: You need to prepare a solution of 0.123M CuSO4 by starting with solid CuSO4·5H2O. You would be able…

A: To prepare a certain concentrated solution from the solid substance, we must decide the amount of…

Q: Q1/ What is the weight, in milligrams, of 0.250 mmol Fe2O3 (ferric oxide),F.wt (159.7 mg/mmol)?

A:

Q: When a Vitamin C (ascorbic acid; MM = 176.12 g mol-1) tablet is crushed, dissolved and titrated with…

A: To determine the moles of KIO3 reacted, no. of Moles of KIO3 = M ×V (Litres)= 0.0377 M × 40.01 mL ×1…

Q: We can measure the concentration of HCl solution by reaction with pure sodium carbonate: Complete…

A:

Q: The silver ion in a 25.00-mL sample was converted to dicyanoargentate (1) ion by the addition of an…

A: Given :  Volume of silver ion solution = 25.00 ml  Volume of EDTA solution used = 43.77 ml…

Q: 2.) Five standardized dilutions of aqueous lead(1I) chromate solution were prepared by adding a…

A:

Q: 0.500 cm3 of concentrated H2O2 solution diluted exactly to 50.00 cm3 by water. 10.00 cm3 samples…

A: Answer :-  Molarity (mol/dm3) of original concentrated H2O2 sample = 9.09 mol/dm3  Mass…