How many milligrams of a preservative are needed 4 fl.oz of a solution containing 0.12%(w/v) of that preservative?

Q: Calculate the mass of ½ gallon of commercial bleaching solution having a density of 1.05 g/ml. (1…

A: Mass of the substance  = Volume of the substance × Density

Q: 85.A solution of known concentration used to standardize another solution is: 1. Primary standard…

A: A standard solution is a a solution of accurately known concentration prepared from a primary…

Q: (1) Calculate the concentration (ugL-1) of chromium in the solution. (ii) Calculate the amount (ug)…

A:

Q: What volume of a 18% (v/v) hydrochloric acid solution is diluted to produce 350 mL of a 5% (v/v)…

A: Given, initial Concentration befor dilution , C1 = 18%  After dilution, C2 .  = 5%  We need to…

Q: 1) Why is NaCIO left out of some laundry bleach? It is not due to price.

A: Given statement,      NaClO left out of some laundry bleach

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: Benzalkonium chloride solution Make a solution such that 10 mL diluted to a liter equals a 1:5000…

A: % w/v means that the certain mass of the substance in present in 100 units of volume.

Q: 5. What weight of HCl is present in 30mL of hydrochloric acid of specific gravity 1.19 and con tains…

A: Given:- Specific density of HCl = 1.19             Concentartion = 37.5% by weight…

Q: tion / Wny not add the last remaining drop of the pipette from the solution by blowing it with your…

A: ANSWER IS :

Q: HG. CH2 CI Ph HO.

A:

Q: Which of the following statements is not correct? O a. Pipettes and droppers should not be inserted…

A: Since you asked multiple questions so as per Q&A guidelines of portal I solve first three parts…

Q: How many volume in liters is required in preparing 1N HCl using 50 grams of it? mwt is 37 g/mole

A: Normality is defined as number of gram equivalent of solute dissolved per litre of solution.

Q: You have a stock solution of 50% (w/v) sodium nitrate and you were asked to prepare 300 ml of a 10%…

A: Given :-  Initial concentration i.e. M1 = 50%(w/v)  Final concentration i.e. M2 = 10%(w/v)  Final…

Q: How many milliliters of 9.00 % stock NaCl solution are needed to create 25.00 mL of 0.900 % (m/v)…

A: C1V1 = C2V2 as number of moles remain same after dilution .or we can say amount of solute remain…

Q: Calculate the equivalent weight of KMnO₄ in the following reaction: MnO₄⁻ + CN⁻ + H₂O ⟶ MnO₂ (s) +…

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: 2. How many millilitres of a 1: 5000 (w/v) solution can be made from 175 ml of a 1:250 solution?

A: We have to calculate the volume of solution that can be made.

Q: From 0.8 av lb of 20% w/w KOH solution 142 86.2 121 72.6 g of 12 percent w/w KOH may be produced.

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Q: How many milliliters of 50% w/v solution should be mixed with 2175 mL of 10% w/v solution to make a…

A:

Q: which method we are going to use in ipecac syrup define and explain this method.

A: Ipecac is commonly made from alcohol extraction of the plants Cephaelis acuminata and Cephaelis…

Q: A ceric sulfate solution that was standardized using 200 mg of arsenic trioxide (MW197.84g/n)…

A: Given: Weight of Arsenic trioxide = 200 mg Volume of solution =38.5 mL Weight of Ferrous Carbonate…

Q: Lahen 9 5o1d is Impure, Its muting Point is higher and broader Tran the muhng unt fur pure Sampleã.…

A: When a pure substance is added with an impurities than the Properties like Melting point, boiling…

Q: Find the normality of 0.0294 g K2Cr2O7 (MM = 294.19) dissolved in 125 mL solution.

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Q: Prepare 1500mL of 0.5N H2SO4 solution with specific gravity of 1.84g/mL and assay of 97%. Write…

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Q: Exactly 1.00 grams of granular table salt was dissolved in deionized water up to 500 mL. An aliquot…

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Q: Prepare 1500mL of 0.5N H2SO4 solution with specific gravity of 1.84g/mL and assay of 97%. Write the…

A:

Q: All the CaSO4 present in 0.511g of an impure sample of plaster is converted to 0.821g BaSO4. What is…

A: All CaSO4 in the mixture is converted in BaSO4  one mole of BaSO4 comes from one mole of CaSO4 233g…

Q: Calculate equivalent weight for H3PO4.

A: The molecular weight of phosphoric acid is= (3+31+16*4)gram/mol = 98 gram/mol

Q: Cosmetics and paints can be manufactured by method called formulation industry 1. Select one O True…

A: 1) Yes, Cosmetics and paints are manufactured by formulation. Hence the given statement is true.

Q: A 12.7g sample of vinegar is titrated.  It requires 19.75 mL of 0.205 M NaOH to neutralize the…

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Q: Required is 1L of 3/8 (v/v) strength solution. The usual concentration of the solution is 12% (v/v)…

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Q: ANSWER ACCO DINGLY. Explain brieriv in 2 sentences and in your OwN words the 1. 2. 3. To reduce…

A: As per the guideline, since you have asked multiple questions, we have solved the first question for…

Q: 4 . What mass in mg of Fe2+ would be in 686g of drinking water if it was at the safe limit of…

A: In this question, we want to determine the mass of Fe2+ in mg unit.  You can see details Solution…

Q: Cosmetics and paints can be manufactured by method called formulation industry a. Select one: O True…

A: 1. (a) A formulation is referred as the mixture that has been designed for an application purpose.…

Q: True or False: The accuracy of a buret is to 0.05 mL.   True or False: Burets are stored with…

A: Given: Some statements are given . To find: wether the given statements are true or false. Solution:…

Q: 18. How much ml of ethanol is needed to make 2000ml of an aqueous 15% (v/v) solution? A. 3000 mL B.…

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Q: How many mL of H2O2 are needed to make 500 mL of 4.50% v/v solution by volume of H2O2?

A:

Q: 0.368 mmoles of NaOH(0.0491 M) is added to 25 ml of sprite during a titration. How many mmoles of…

A: Given that -  mmoles (millimoles)  of NaOH = 0.368 mmoles  Molarity of NaOH = 0.0491 M  Volume of…

Q: How much hydrazine is needed to prepare 100 mL of a 0.5 M stock solution?(MW = 32g/mol) b) How…

A: To determined mol of substance(quantity) we can use Molarity formula of solution which is give…

Q: True solution is transparent. * O True O False

A: True solution is when solute is dissolved uniformly through out the solution. And is homogeneous…

Q: Briefly discuss the effect of alkalinity on flocculation.

A:

Q: Samples were taken from a two water sources, Lake A and Lake B. Aluminum concentrations in Lake A…

A: Given: Concentration of Lake A = 17 ppm  And concentration of Lake B = 17 ppb.

Q: Calculate the Con centration of aspecific Solution having the molay a bsorption Coe fficient…

A:

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: reduces Benedicts and Fehling's solution:

A: a.  Sulphuric acid : not possible to oxidize it more ,so it does not reduce Benedicts and Fehling's…

Q: ch tin is plated out of the solution?

A:

Q: Vhat volume of 6.0 M KNO3 would be required to create 700.0 mL of a 0.75 M KNO3 solution

A: Dilution of the solution: When we dilute a concentrated solution with pure water, the mole of solute…

Q: How many milliliters of a 1:50 (wv) stock solution should be used to make 3 liters of a 1:5000 (w/v)…

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Q: Diffusion of Gases Consider that you carried out the following, where you 1. Place 1.0 mL of dilute…

A: Phenolphthalein is an indicator that is used for the detection of acidic or basic medium. The pH…