What is the concentration in parts per million of DDT for 0.040mg in 1240 plankton?

Q: What is the amount in moles of sodium hydroxide in 25.00 cm3 of a solution of concentration 0.10…

A:

Q: A 786 mLmL NaClNaCl solution is diluted to a volume of 1.19 LL and a concentration of 3.00 MM . What…

A: Solution :       The amount of moles in the solution remains constant even after dilution. The…

Q: If  niferex liquid solution provides 10 mg of elemental iron in 1 teasepoonful, how many mL of…

A: We need to calculate mL of solution required to provide 55 mg of elemental iron.

Q: A 887 mLmL NaClNaCl solution is diluted to a volume of 1.45 LL and a concentration of 6.00 MM . What…

A: The initial volume of the NaCl solution is = 887 mL The initial concentration of the solution is =?…

Q: What mass (in grams) of Mg(N03)2 is present in 145 mL of a 0.150 M solution of Mg(NO3)2 (At wt Mg…

A: Since, Moles of Mg(NO3)2  Present = molarity of solution X Volume of solution in L Molarity of…

Q: How many grams of Ba(103)2 (487 g/mol) can be dissolved in 500 mL of water at 25 C. (Ksp of Ba(10a)2…

A: Solubility product constant  is equilibrium constant for a solubility equilibria.  It is represented…

Q: What is the concentration (In parts per million) of DDT for 0.019mg in 1025g plankton?

A: 1 ppm = 1 mg/kg

Q: 0.10 M NaCl, 0.10 M NaNO3, 0.10 M NaC2H3O2      These all have the same cation, Na+. Which anion…

A: The speed at which the ions move through a gas under the influence of unit electric field is known…

Q: could a solution form when Cl2NH is mixed with CCl4?

A: Solution :     Polarity is defined as a condition at which a molecule or atom possesses positive and…

Q: Why common salts such as sodium chloride (NaCl) and Calcium Chloride (CaC12) are preferred in cold…

A: CaCl2 is used to clear the snow from the roads in cold countries because it depresses the freezing…

Q: How many grams of lodine should be used in preparing 5000 mL of 1:20 solution?

A: 1:20 means 1 g of Iodine is dissolved in 20 ml. So we have, 20 ml dissolves 1 g Therefore,  1 ml…

Q: A 2269g sample of ground water is found to contain 0.0583 g of arsenic. Calculate the concentration…

A: Given : Mass of water = 2269 g And mass of arsenic = 0.0583 g

Q: If the Ksp of NaCl is experimentally determined to be 54.2, then what is the concentration of Na+…

A: Suppose, the solubility of NaCl is S M We know that Ksp of the compound XaYb = aabbS(a+b) (When…

Q: Given a 20% w/v solution of chlorhexidine gluconate, what volume is required to make 400ml of a 2%…

A:

Q: a) Write the chemical equation for the dissolution of NH4Cl in water. b) Write the chemical…

A: Dissolution can be defined as the process of dissolving the substance or solute (solid, liquid, or…

Q: calculate the volume in ml of 0.01 m KOH solution that is required to completely neutralize 250 mg…

A:

Q: 5. What is the effect of increased cross-linking on the physical properties of the slime?

A: Slimes are an example of polymers. When borax is introduces to the glue, a heavily viscous form of…

Q: What is the osmotic pressure at 25 °C of an aqueous solution that contains 0.001 M of C12H22O11 ?

A:

Q: Predict the solubility of vitamin B 3 in water.

A: Niacin is a form of vitamin B3. It is also known as nicotinic acid. It is an essential human…

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: pka : 8.5 WH₂ OH (C) ( 13 ) pka 24.5 compound is likely to be least Soluble a+ pH = 6.5 which which…

A: Acids dissolve in bases and bases dissolve in acids as they react with each other. Lower the value…

Q: Calculate the number of grams of KOH required to neutralize 22.2 mL of H3PO4 with a concentration of…

A: molarity = moles/volume of solution(in L)  so, moles = molarity × volume (in L)     number of moles…

Q: What is the ppm concentration of mercury in fish tissue if, after testing with an instrument, it was…

A: Given: Mass of mercury = 0.000475 g Mass of tissue = 2.250 g

Q: 13.39 (a) Calculate the mass percentage of Na2S04 in a solution containing 10.6 g of NaSO4 in 483 g…

A: (a)Mass percentage of Na2SO4 can be calculated as

Q: In Canada and the United Kingdom, devices that measure blood glucose levels provide a reading in…

A: Concentration is equal to the ratio of the number of moles to the volume of the solution. Its unit…

Q: Calculation: If the concentration of K+ in seawater is 10.6 mM, what is this in ppm? (The density of…

A: So 4th option is correct✅

Q: How many gram of H2SO4 are necessary for the preparation of 0.175dm^3 of 6.00M of H2SO4?

A: We have 0.175 dm3 as volume , Molarity as 6 M, we have to calculate the mass of the sulphuric acid…

Q: How to deal with a product contaminated by NaCl?

A: 1st case: When the product is insoluble in water. When the residue or our product is insoluble in…

Q: OH and 0.20M NaCH3COO? !! II 12 2.

A: Buffer : those solution which resist to change the pH when small amount of acid or base add in this…

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: e concentration of Br in a sample of seawater is 9.3 · 104 M. If a liter of awater has a mass of 1.0…

A: Molatity of Br-  solution = 9.3 × 10-4 M  Mass of seawater taken = 1.0 kg  Volume given = 1.0 L

Q: A 2333 g sample of ground water is found to contain 0.0503 g of arsenic. Calculate the concentration…

A:

Q: 2. Determine the volume of 0.10 M potassium thiocyanate needed to prepare 100.00 mL of a 0.00100 M…

A: Ans. According to law of similarity:           N1V1=N2V2…

Q: A 2.5-g sample of groundwater was found to contain 5.4 mg of Zn2+. What is the concentration of Zn2+…

A: Given information: Mass of sample = 2.5 g Mass of Zn2+ = 5.4 mg

Q: What is the concentration of potassium (K+) in a 1.000 x 10-4 M aqueous solution of potassium…

A: Parts per million (ppm) :-  The number of perts by weight of solute present in million (106) parts…

Q: If 0.50 mol of KCl are dissovled in a certain volume of distilled water and a second solution is…

A: The conductance of the solution depends upon the number of ions and greater the number of ions will…

Q: How many grams of potassium citrate (C6H5K3O7 * H2O - mw 324) should be used in preparing 500 mL of…

A: Moles of solute per unit volume is known as Molarity

Q: What is the sodium ion concentration in 1.0L of solution containing 7.29 grams of Na3PO4? Why…

A: Given :  Amount of Na3PO4 = 7.29 g  Volume of solution = 1.0 L  To calculate :-  Concentration of…

Q: How many grams of Mg(OH)2 are contained in 1500 mL of 0.025 N Mg(OH)2 solution?if you known atomic…

A: Normality is the number of the gram Equivalents of the Solute present in one of the solution. It is…

Q: What is the purpose of the ion exchange resin? a. The ion exchange resin takes out Ca2+ and gets…

A: Ion resins are used for softening water.

Q: What is the concentration (In parts per million) of DDT for 3 x 10^-4 in 1.3kg of fish tissue?

A:

Q: What is the solubility of PbF2 in water? (Ksp of PbF2 is 3.6 × 10-8) |1.34 х 1004 M 1 2 4 C 7 8 3.

A: Given: Ksp of PbF2 is 3.6*10-8

Q: What is the purpose of the ion exchange resin? A. The ion exchange resin removes Ca2+ and Mg2+ out…

A: Ion exchange resin method is used to make water softer.

Q: What is the purpose of the ion exchange resin?

A: As the name implies ion exchange so in this process ion exchange takes place

Q: electrolyte, ölytewhenitis dissolved in water? What species are present inC12H22O11(ag)?

A: The question is based on the concept of solutions. We have to identify nature of sucrose as an…

Q: What is the Molarity of the solution prepared by diluting 35.0 mL of 1.25 M AgNO3 to 95.0 mL?

A: On diluting a solution, no of moles do not get change. As no of moles = Molarity ×Volume, thus…

Q: 2.5 g sample of groundwater was found to contain 5.4 ug of Zn. What is

A: The ppm is applied to the solution which are very dilute.when the amount of solute is very less, ppm…

Q: A silver nitrate solution contains 29.53 g of primary standard AgNO3, in 1.00 L what volume of this…

A: We have to calculate the volume of solution  .

Q: Describe the preparation of a. 600 ml of 5 75% (w/v) aqueous glycerol (C.H.OH, 46.1 g/mol) b. 600gof…

A: Percent (w/v) is a form of expressing the concentration of a solution, that is weight/ volume…

Q: Which one of the following compounds is insoluble in water? A) ZnC12 B Ca(C2H302)2 с) К2504 D MgC204…

A: compounds that do not break into ions are insoluble in water.

Environmental Pollution

Environmental pollution occurs due to some unwanted alteration in the surroundings which results in unfavorable effects on all organisms of that surrounding.