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- SK weighs 23 kg and mom reports that he consumed 2 tubes of toothpaste that were each 130 g with 0.14% fluoride. What is the total fluoride dose, in mg/kg?Gyuri performed an analysis of Simvastatin tablets. The following are the data she obtained: 39.5 mg, 41.2 mg, 40.7 mg, 38.9 mg, 42.1 mg, 41.7 mg, 38.7 mg Suppose the mg of Simvastatin stated in label is 40 mg, is there a significant difference between her results and the label claim?An iron ore has a 55% Fe2O3 with 5% moisture content. What is the Percentage of Iron in a dry basis? Answer must be in 2 significant figures.
- What will happen if you forgot to remove air bubbles in the burette while performing standardization. What would be its effect on the concentration of the unknown sample? Select one: a. Decrease b. Increase c. Cannot be determined d. No effect- attempt- Q5: Select the correct answer for the following multiple-choice questions: 1. Asphalt penetration test can measure a. Consistency b. Aging c. Tension properties d. Safety 2. An emulsifier is commonly used to produce a. Tack coat b. Prime coat c. Emulsified asphalt d. Tar 3. The quality of performance of a soil as a subgrade material and group index are a. Inversely proportional b. Not related c. Directly proportional d. All of the above 4. The sieve that separates fine and coarse aggregates in asphalt mixture design is d. No.40 c. No.10 5. Kerosene is used as a solvent to produce a. Tar b. Emulsified asphalt c. Cutback asphalt a. No.200 b. No.4d. Oxidized asphaltAnalysis was run on samples from a known CRM with 8.85% Fe. The following results for %Fe were obtained by an analyst: 8.75, 8.51, 8.25, 8.61. Which of the following statements is true assuming none of the data points are outliers? Group of answer choices Tcalc = 63.15 The analysis is not accurate at the 95% confidence interval. Tcalc = 3.03 The analysis is accurate at the 95% confidence interval. Not enough information to determine Tcalc = 63.15 The analysis is accurate at the 95% confidence interval. Tcalc = 3.03 The analysis is not accurate at the 95% confidence interval.
- Data of Candy (first trial) Mass of candy: 6.1115g Concentration of NaOH (M): 0.09639 Volume of NaOH solution used: 17.2 mL Data of candy: (2nd trial) Mass of candy: 6.5320g Concentration of NaOH (M): 0.09639 Volume of NaOH solution used: 17.2 mLIn a gravimetric chloride analysis, it was found that 0.82g AgCl was obtained from an unknown that had a mass of 0.3g a. What is the mass of CL in the original sample b. Percentage chloride in original sample c. Average percent chloride d. Standard deviation e. Relative standard deviation expressed as a percentCalculate the average K and standard deviation given the following K values: 804, 698, 725.
- Data of milk: (first trial) Mass of milk: 104.4579g Concentration of NaOH (M): 0.09639 Volume of NaOH solution used: 5.5 mL Data of milk: (2nd trial) Mass of milk: 103.8405g Concentration of NaOH (M): 0.09639 Volume of NaOH solution used: 5.3 mLA method to determine an antibiotic was developed and validated in a pharmaceutical company. The method allows analysis of 100 mg tablets containing 7.5 mg of the antibiotic. According to the validation data, the confidence limits are 7.50 mg± 0.04mg. How many samples will need to be analyzed for an analyst to ensure that the content of the antibiotic in a macerated sample of that drug is 7.50 mg ± 0.03 mg with 95% reliability when analyzing 100 mg of the macerated sample?A standard deviation of 0.044 is a good thing or a bad thing?