Answered: How many milligrams of Zinc oxide…

How many milligrams of Zinc oxide should be added to a 25 g of 10%w/w Zno ointment to make it a 12.5%w/w Zno ointment? Round-off your final answver up to the 2nd decimal place.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: How many grams of NaAsO, should be weighed out to prepare a stock solution of 100 mg/L in 500 mL…

A: A numerical problem based on stock preparation, which is to be accomplished.

Q: 109 1,000,000,000 nano n Calculate the % (mass/mass) composition, ppm, and ppt of Si in an alloy of…

Q: What is the concentration of hydrochloric acid? Find the concentration using the information given…

A: A question based on acid-base titrations that is to be accomplished.

Q: MX (Ksp = 2.42x10-11) Express your answer in moles per liter. S = Submit Part B S = IVE ΑΣΦ PbCl2…

Q: Suppose you prepared a stock solution of Ca(OH)2 by dissolving 0.6580 g (weight obtained from…

A: a) To calculate the molarity of the Ca(OH)2 stock solution, you need to know the molar mass of…

Q: After Larry had taken Nexium for 4 weeks, the pHpH in his stomach was raised to 4.51. What is the…

Q: Find the percentage of nitric acid if you know that 9.777 G has been diluted with water to a liter…

A: Given Data: Total Mass of HNO3 sample = 9.777 g Volume of HNO3 sample = 1.0 L Volume of HNO3 used…

Q: Please help me solve

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: 34.Créate two conversion factors from the concentrations. (hint: per cent means part of 100) 12.5%…

A: Table A.1 Lengthm cm km in. ft mi1 meter 1 102 10−3 39.37 3.281 6.214 × 10−41 centimeter 10−2 1 10−5…

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: Use the References to access important values if needed for this question. If 20.7 grams of an…

A: weight/weight percent is a unit of concentration. It is defined as the weight of solute in grams per…

Q: if 0.0125g of caffeine diluted with water in 250 ml volumetric flask give me a solution with a…

A: Due to technical error ,unable to provide you the solution. Please resubmit the question once again

Q: Q3/ A) 0.63 g of a sample containing Na,CO3, NaHCO, and inert impurities is titrated with 0.2 M HCI,…

A: The question is based on the concept of titrations. we have to estimate amount of sodium carbonate…

Q: boiling point of 500 mL of chloroform if 10.50 grams of caffeine

Q: Chapter 37 Pharmacology Basi I. Liquid Medication Doses-Labels Do Not Match Solve the problems and…

Q: Calculate the water content of antibiotic powder weighing 350 mg. The water equivalent factor is 4.6…

A: The % of water content in the drug is determined by the formula is shown below. The antibiotic drug…

Q: A particular plant food has a label that reads 8-12-4. The second number refers to the % P2O5 the…

A: Given: Mass of sample = 10.0 g. And mass of MgNH4PO4·6H2O produced = 4.75 g.

Q: Which Keg corresponds to a negative value of AG , Keg = 225 or Keg = 0.125? Select the single best…

Q: How many grams of chromium(III) sulfate, Cr2 (SO4)3, are required to make a 5.23 %(w/v) aqueous…

Q: What is the final volume in millilitres when 0.575 L of a 38.5 % (m/v) solution is diluted to 21.7%…

A: -> From dilution moles does not change . Initial volume (V1) = 0.575 L = 575 ml (1L=1000ml)…

Q: How many milliliters of a solution that is 11.21% (w/w) HNO3 with a density of 1.2000 g/mL should be…

A: In the given question, the mass percentage of the solution, the density of the solution is given.…

Q: A 500.00 mg vitamin C (MW176.12g/mol) tablet was ground, acidified, and dissolved in H2O to make a…

A: The amount of vitamin C (ascorbic acid) present in the sample can be determined by iodometric…

Q: Please help me answer the following question. It will be a big help, thank you! *Calculate the %…

A: Given; For question 1st. The mass of CH3OH=22 g. The volume of solution=100 mL=0.1 L For question…

Q: 10 L of a solution that has a concentration of 20%v/v EtOH is mixed with 50 L of a solution that has…

A: Answer: Volume is the extensive property that's why it is additive, so to solve this question we…

Q: Part A A doctor orders 0.075 g of chlorpromazine, which is used to treat schizophrenia. f the stock…

Q: 1.How many mL of stock solution (50 mM KCl) will you use to prepare 25 mL of a 5X dilution? Round…

A: The concentration can be determined by the concentration equation. It is written as:Here C is the…

Q: What is the concentration, in mg/mL, of a solution containing 2 mEq of potassium chloride per mL? MW…

A: The objective of the question is to calculate the concentration of a solution in mg/mL, given the…

Q: You are going to mix a 1:10 bleach solution with water to make 500 mL of a 1:35 bleach solution. How…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

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: A solution of FESCN2+ has a concentration of 1.00 x 10-4M and an absorbance of 0.755. What is the…

A: Given, A1 = 0.755 A2 = 0.491 C1 = 1 X 10-2 C2 = ? To calculate C2.

Q: A total of 25 mL of 6.0 M H₂SO4 solution was spilled on Dita's lab table. To neutralize it, Dita…

Q: What is the limiting reagent in the active ingredient Calcium Carbonate above?

A: The limiting reagent in a chemical reaction is the one that runs out first. If this reagent is…

Q: How many grams of nickel(II) nitrate, Ni(NO3)2 , are required to make a 8.96 %(w/v) aqueous solution…

Q: 17- If 125 grams of solid sucrose (C12H22011) with 93% purity by mass is dissolved in 250.0 mL of…

A: Purity of sucrose = 93% Weight of sucrose = (93/100) x 125 = 116.25 gram Molar mass of sucrose =…

Q: If a patient is getting 2.5L NaCL 0.9% over 18 hours, what is the rate per hour in mL?

A: We are given, 2.5 L NaCl 0.9% over 18 hours. We need to calculate this rate as mL/hour.

Q: I had a 6.00 M NaOH solution and I diluted it to a 50mL solution of 0.300 M NaOh solution by adding…

A: According to the unit conversion, 1 mL is equal to 10-3 L. The number of moles in the 20 mL of the…

Q: A sample of an industrial waste water is analyzed and found to contain 48.6 ppb Ni2+. How many grams…

Q: Copper(II)-ammonia system 1. Place 1 mL 0.1 M CuSO̟ into a test tube. Then, add 5 drops 1. 00 M NH,…

A: Addition of excess ammonia, NH3 to copper(II) ion forms a complex compound that leads to a change in…

Q: Quesion 1 a Calculate the (m/v) % concentration when 25.3 g of NaCl dissolved in 1.5 L of…

A: Since we only answer up to 3 sub-parts, we will answer the first 3 only. Please resubmit the…

Q: A KHP standard weighing 5092 g was dissolved in water. It took 22.15 mL of a NaOH solution to…

A: 1) For the standardization purpose of NaOH KHP is used as primery standards Molecular weight of KHP…

Q: QUESTION 9 (4b-301-196-3.69) A 196 gram sample of glucose (C6H1206) was used to make a 3.69 M…

A: According to the question, Mass of glucose = 196 g Molarity of solution= 3.69 M Molar mass of…

Q: Question (3 points) The common pain relievers - aspirin (C₂H8O4), acetaminophen (CH₂NO₂), and…

Q: 1. A wastewater sample has the following composition: NO3 = 37 mg/L as N CO3²=2.5 x 10 mol/L PO4³-=…

A: This is a problem based on general chemistry where we are finding out the different concentration…

Question

How many milligrams of Zinc oxide should be added to a 25 g of 10%w/w Zno ointment to make it a 12.5%w/w Zno
ointment? Round-off your final answer up to the 2nd decimal place.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

5.35g of salicylic acid added to 7.75mL of methanol followed by 10 drops of sulfuric acid,H2SO4 and the resulting mixture was refluxed for 30 min. If 3.85mL of methyl salicylate were distilled from the mixture. What's the percent yield? Answer to 1 decimal place
Materials/Chemicals: Volumetric flasks Beakers Serologic pipetters Aspirators Vials/test tubes Cone. H3PO4 (85% w/w, sp gr. 1.70, MM 98) Cone. HCL (37.3% w/w sp. Gr. 1.18, MM 36) Glacial acetic acid (99.7% ww, sp gr. 1.05, MM 60) NaOH pellets NaH2PO4 Na2HPO4 Acid-base indicators: Bromophenol Blue Bromocresol green Phenol red Methyl red Methyl orange Phenolphthalein Thymol Blue pH paper pH meter Weighing balance For chemicals, refer from the template below. Research the chemicals to be used especially those that are new to you and write down the information needed. Name of Chemical Molec. Weight (g/mol) Melting point Boiling point Density (g/mL) General properties Methodolody: (Include a short summary of the overall experimental plan you are going to run. You may use flow chart or bullet form for this part. Sketches of any experimental set-ups used in the experiment or the workup procedures). Preparation of buffers Prepare 250ml of the…
A student needs 25.0 mL of 7.18x10 4 M FD&C Blue Dye No. 2 solution. If the student has 2.00 mM FD&C Blue Dye No. 2 stock solution to work with, how much of the 2.00 mM solution should be added to the 25.0 mL volumetric flask? Hint, 2.00 mM is 0.00200 M. O 0.1114 mL O 7.474 mL O 1.114 mL 8.974 mL 2.786 mL
||| MEASUREMENT AND MATTER One step dosage calculations An elderly patient with chronic osteoarthritis experiencing a flare-up is to receive 0.9 mg of dexamethasone by injection. The drug vial is labeled "dexamethasone sodium phosphate 4.0 mg/mL." How many mL of the solution in the vial should be drawn up in a syringe for administration to the patient? Round your answer to the nearest 0.01 mL. mL Explanation B Check X Q Search 0/3 © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility wwwpet @
Answer is provided. All I need is the solution. Thank you! The following regimen for oral prednisone is prescribed for a patient: 50 mg/ day × 10 days; 25mg/day × 10 days; 12.5 mg/day × 10 days; and 5 mg/day × 10 weeks. How many scored 25-mg tablets and how many 5-mg tablets should be dispensed to meet the dosing requirements? Answer: Thirty-five 25-mg tablets and seventy 5-mg tablets
A 500.00 mg vitamin C (MW176.12g/mol) tablet was ground, acidified, and dissolved in H2O to make a 250.0 mL solution. A 50.00 mL aliquot containing vitamin C, KI and starch was analyzed and titrated with 12.31 mL of 0.01042 M KIO3. What is the % (w/w) vitamin C in the tablet? KIO3 + 5 KI + 6 H+ = 3 I2 + 6 K+ + 3 H2O C6H8O6 + I2 = C6H6O6 + 2I- + 2H+ A 67.77 % B 33.89 % C 22.59 % D 3.39 %
What is the working solution and DI water of the unknown solution?
Which of the following is the correct method for creating 100mL of 6M acid from a 12M stock? Measure out 75 ml of the concentrated acid using a graduated cylinder and add it to 25 mL of DI water and mix thoroughly Measure out 50ML of the concentrated acid using a volumetric pipette in a 100mL volumetric flask, top it off with DI water and mix thoroughly Measure out 50mL of the concentrated acid using a graduated cylinder and add it to 50mL of DI water and mix thoroughly Measure out 50 mL of the concentrated acid using a beaker and add 50mL of water to it
Can someone help me with number 7 please ☺️?
F. Calculate the concentration of OH 25 degrees at 25 Express your answer using two significant figures and include the appropriate units. G. Calculate the concentration of Na at 25 ∘ C Express your answer using two significant figures and include the appropriate units. I. Calculate the concentration of His− at 45 ∘C . J. Calculate the concentration of HisH at 45 ∘C k. Calculate the concentration of HisH+2 at 45 ∘C . L. Calculate the concentration of HisH2+3 at 45 ∘C M. Calculate the concentration of H+ at 45 ∘C n. Calculate the concentration of OH−at 45 ∘C O. Calculate the concentration of Na+ at 45 ∘C .
We prepared a 100.0 μg/mL quinine stock solution by transferring 100.0 mg of quinine to a 1-L volumetric flask, adding 50 mL of 1 M sulfuric acid and diluting to volume with deionized or distilled water. Find the molecular weight of quinine and determine the molar concentration of the 1µg/mL quinine standard.
The following reactions happen simultaneously when HCl is added to a mixture of Mg(OH)2and MgCO3:Mg(OH)2 + 2HCl → MgCl2 + 2H2OMgCO3 + 2HCl → MgCl2 + H2O + CO2What volume (in mL) of 37 wt.% HCl solution (density = 1.2 g/mL) is needed to completelyreact a 25-g mixture of 35.2% MgCO3 and 64.8% Mg(OH)2 by weight?