For direct detection of fungal element, how much 40% KOH solution needed to make 50ML of 10% КОН?

Q: If I have 1 mole or 10.8 x 10^-3 moles of H2SO4 and a volume of 100 mL of H2SO4 what is the…

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Q: KNO KCI NaCk 20 40 60 80 100 Temperature (°C) Grams of solute dissolved in 100 g of water

A: The given graph is :

Q: Two moles of thiosulfate reacts with one mole of triiodide according to the equation (Note:…

A: Here we are required to determine the rate of consumption of triiodide

Q: if i want to dilute 500L of a 2 M PbNO3 solution to a 1.5 M PbNO3 solution what will be the volume ?

A: Given :-  Initial concentration = 2 M  Initial volume = 500 L  Final concentration = 1.5 M  To…

Q: (1). What is the meant by hardness of water? Explain the difference between temporary and permanent…

A: To find: Definition for the hardness of water. Difference between the temporary and permanent…

Q: 4 g 5 g 28 100 g R Lactic acid Salicylic acid Trichloroacetic acid Flexible collodion qs ad Sig:…

A: Given, Mass of lactic acid = 4 gm Mass of salicylic acid = 5 gm Mass of tri chloroacetic acid = 2 gm…

Q: Concentrated nitiric acid is 16M. What volume of HNO3 is diluted with distilled water to prepare…

A: We have concentrated Solution as 16 M, final volume is 5 Liter of 0.1 M. We have to predict the…

Q: The mg/L concentrations of 2.50x104 M solutions of HNO, (F.wt 63 g/mol) equal. 15.57 15.75 17.5 15.5

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Q: How many milliliters of 0.10 M Pb(NO 3 )2 should be used to make ni(en)(h2o)4so4 10% mole excess?

A: This question must have a known value of the amount of Pb(SO4)2 produced.... So see the complete…

Q: urticaria is analyzed and found to contain 64.87 %C, 6.44 %H, 9.13 %CI, 7.21 %N, and the rest as 0…

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Q: You need to make a large quantity of a 5% solution ofHCl but have only 25 mL HCl. What volume of…

A: The solution is a mixture in which the lowest amount (solute) is dissolved or distributed in a high…

Q: Aspirin, C₂H8O4, is produced from salicylic acid, C7H603, and acetic anhydride, C4H603, as shown…

A: A.Salicylic acid and aspirin have a mole ratio of 1:1.  is needed to make ²2.3×10²kgacid of…

Q: MCC powder contains 86.6% proteins and WPI powder contains 93.4% protein. Calculate the amount of…

A: The amount of powder required can be figure out from the concentration of solution required.

Q: How are 4ml of 50mM CaSO4 solution prepared from a 2M CaSO4 stock?

A: Molarity (M2) = 50 mM Volume (V2) = 4 ml  Molarity (M1) = 2 M  Volume (V1) = ?

Q: How much of a 37% formalin solution in H2o needs to be added to create a final volume of 500 mL at…

A: Given,Concentration of formalin(C1)=37%Concentration of diluted solution(C2)=4%Volume of…

Q: Calculate the mass of a 25.0 wt% KOH solution required to make 525.0 mL of 0.285 M KOH. mass: g

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Q: A compound with the percent composition shown below has a molar mass of 182.17176 g/mol. Find it's…

A: To determine the molecular formula of the compound, we need to first determine empirical formula.…

Q: How would you prepare a 1 L solution of 0.5 M NaCl? Make sure to include all appropriate…

A: Preparation of a 1 L solution of 0.5 M NaCl given below.

Q: Get the concentration of the unknown solutions with a %T of 63 Given: S1 = 0.02 mg 76%T S2 = 0.04…

A: Given: S1 = 0.02 mg 76%T S2 = 0.04 mg 58%T S3 = 0.06 mg 45%T

Q: What volume of water is required to make a 0.03 M MgCl2 solution staring with 4.95 g of MgCl2.…

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Q: total Eq of the mixture

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Q: 1. How many liters are required to make 0.2M solution if 54g Na₂SO4 is used? Na = 23g; S = 32g;…

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Q: Post-lab Question #6: What mass (g) of NaCI is dissolved in 200 g of water in a 0.100 m solution?…

A: Given data: *The mass of water is 200 g.  *Molality is 0.100 m.

Q: 2. Calculate the molarity of a solution containing 5 g of NaOH in 450mL solution?

A: Molarity:. It is defined as the number of moles of solute present in the given solution in ml.

Q: Which of the following solutes, dissolved in 1000 g of water, would provide the greatest number of…

A: Ammonia (NH3) is a covalent compound therefore do not dissociates into ions therefore 1 particle

Q: 1. How many grams of Ca(OH)2 are needed to neutralize 25.0mL of .100M HN03? The reaction proceeds as…

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Q: question 12 Calculate the initial molarity of a generic amine, R3N (Kb = 7.23x10-6), whose pOH =…

A: Here we have to calculate the initial molarity of a generic amine, R3N where we have given that the…

Q: You need to make 13 mL of a 66 mM solution of a compound with FW 128.96. How many milligrams of the…

A: Given, Note: 1 mM = 10-3 M and 1 mL = 10-3 L Concentration of the solution = 66 mM = 0.066 M = 0.066…

Q: How many grams of CaCl2-2H2O are required to make 125 mL of 0.129 M CaCl2?

A: Answer:Number of moles of a specie in a solution is always equal to the product of its molar…

Q: The boiling point of water is 100.0°C at 1 atmosphere. How many grams of barium hydroxide (171.4…

A: We have to find the mass of barium hydroxide:

Q: What was the concentration of my stock solution if I used 26mL of it to make 116ml of a 1.5 M…

A: Given that, V1= 26 mL , M1=? V2=116 mL , M2= 1.5 M

Q: How many mL of 6.00 M NaCl are needed to prepare 125 mL of 1.50 M NaCl

A: The initial molarity of NaCl solution is .The final volume of NaCl solution is .The final molarity…

Q: The number of moles produced in H2Oin reaction of 100 mL 1.0M HCl & 100 mL 1.0 M NaOH (Show…

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Q: Based from the Molarity of the palmitic acid solution that you were able to solve from the previous…

A: Given, Molarity of palmitic acid(to be prepared), M1=0.53 M Volume of palmitic acid (to be…

Q: How many milliliters of 3.5 M H2SO4 are needed to make 250 mL of 0.10 M H2SO4?

A: Given: Concentration of H2SO4 stock solution = 3.5 M Concentration of final H2SO4 solution = 0.10 M…

Q: 0.6g phenol C6H5OH in 500 mL H2O, Ka = 1 x 10-10

A: The objective of the question is to calculate the pH of the solution when 0.6g of phenol (C6H5OH) is…

Q: Prepare 2. Serum vitamin C concentration is 0.9mg/dL. Express this concentration in umol/L…

A: The solute in solvent is called solution. The amount of solute in solvent is measure in terms of…

Q: What was the concentration of my stock solution if I used 34mL of it to make 125ml of a 1.6 M…

A: Given, Stock solution: Concentration of the stock solution (M1) = ? Volume of the stock solution…

Q: How many grams of NaOH would be in 25 mL of 0.100 M NaOH?

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Q: How many moles of CH3CH2Br are contained in 548 mL of 0.0788 M CH3CH2Br solution? 5.25 × 10-2 mol…

A: Moles of ethyl bromide = molarity of ethyl bromide*volume of solution

Q: Prepare 2 liter of approximately 0.50M Nacl using solid NaCl

A: Given, Concentration of NaCl solution = 0.50 M = 0.50 mol/L Volume of the solution = 2.0 L…

Q: What should be the volume of concentrated acetic acid that should be measured to prepare 100 mL of…

A: Volume of the concentrated acetic acid to be used is 1.15 mL or approximately 1…

Q: How many moles of Na2CO3 are there in 10.0 L of 2.00 M solution? Show a clear solution.

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Q: According to the label on a bottle of concentrated hydrochloric acid, the contents are 36.0% HCl by…

A: Given - Percent of HCl (by mass) = 36.0% Density of solution = 1.18 g/mL

Q: 1. Make up 0.1 M solutions (100 ml) of Na2HPO4 (FW=177.99) and NaH2PO4 (FW=137.99) using a 100 ml…

A: Molarity of any solution is defined as the number of moles of solute present in 1 liter of solution.…