Step 1 for a One-Way Within-Groups ANOVA v1

Is the concentration of the solution prepared in the question below only approximate because sodium hydroxide is not a primary standard? * Find the mass in grams of sodium hydroxide that will be required to prepare a solution with a concentration of 0.500 mol·dm⁻³ in a 250 cm³ volumetric flask. [Round the answer to three decimal places. Do not type in the unit. Use a decimal point.] *

What is the single dose for a child weighing 53 lbs if the usual pediatric dose of cefazolin sodium is 25 mg/kg/day divided equally into 3 doses? Express your answer in mg.

Blood has a density of 1060 kg m−3 whereas the density of the cerebrospinal fluid is 1007 kg m−3. What mass of cerebrospinal fluid will have the same volume as 68 g of blood?

You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.

The active ingredient of Benadryl© Chesty Forte Cough Liquid is Guaiphenesin an expectorant drug used to assist the expectoration ('bringing up') of phlegm from the airways in acute respiratory tract infections. A 200.0 mL bottle of Benadryl© Chesty Forte Cough contains 4.00 g of Guaiphenesin (C10H14O4). If the recommended dose for a child is 150 mg of Guaiphenesin. What volume of the cough liquid should be administered?

Which of the labeled points in the graph below represents the equivalence point? E 14.00 10.00 OA B D 6.00 4.00 0.00 9.00 2.00 D 4,00 6.00 Volume NOR, 4 KOO 10.00

During a routine check of the fluoride content of Gotham City's water supply, the given results were obtained from replicate analyses of a single sample: 0.815 mg/L, 0.789 mg/L, 0.811 mg/L, 0.789 mg/L, and 0.815 mg/L. Determine the mean and 90% confidence interval for the average fluoride concentration in this sample. Report the mean and the confidence interval using the "real rules" for significant figures. mean: 0.804 90% confidence interval: 2.32 x10-4 Incorrect mg/L mg/L

8. A student made a series of measurements of Mg* concentration in drinking water giving the following values: 269 ppm, 215 ppm, 248 ppm, 242 ppm, 238 ppm, 259 ppm, 265 ppm What is the experimental (or calculated) Q value for this data set? Determine if any values should be rejected from this data set at the 90% confidence level.

The active ingredient of Benadryl© Chesty Forte Cough Liquid is Guaiphenesin an expectorant drug used to assist the expectoration ('bringing up') of phlegm from the airways in acute respiratory tract infections. A 200.0 mL bottle of Benadryl© Chesty Forte Cough contains 4.00 g of Guaiphenesin (C10H14O4). If the recommended dose for an adult is 350 mg of Guaiphenesin. How many moles of Guaiphenesin does this equal? (answer to 2 significant figures)

A patient weighing 185.0 lb is prescribed a 10.0% IV Flebogamma immunoglobulin (IG) solution for primary immunodeficiency. The recommended dose is 300.0 mg IG per kg body mass. Assuming a maximum infusion rate of 5.00 mg/kg per minute, how many hours will it take to administer the recommended dose?

Will a ppt of PBCO3 (s) form if you mix 30 mL of 1.3 x 10-8 M Pb(NO3)2 (aq) with 120 mL of 5.7 x 10-6 M Na2CO3 (aq)? (Which of the following is entirely correct?) Q = 7.4 x 1014, no ppt %3D OQ = 7.4 x 10-14, ppt forms 2.5 x 10-9, ppt forms Q = 1.2 x 10-14, ppt forms %3D Q = 1.2 x 1014, no ppt

Glucose levels are routinely monitored in patients suffering from diabetes. The glucose concentrations in a patient with mildly elevated glucose levels were determined in different months by a spectrophotometric analytical method. What is the mode of the glucose concentration on Month 2? Time Glucose Concentration (mg/mL) 1108, 1122, 1075, 1099, 1115, Month 1 1083, 1100 Month2 992, 975, 1022, 1001, 991 Month 3 788, 805, 779, 822, 800 Month 4 799, 745, 750, 774, 777, 800, 758 992 mg/L 996 mg/L 101 mg/L O None of these

Dr. TS You found lead in blood collected from children living within 5 km from the Ship Channel. Calculate weighted average lead concentration (mg/L) in their blood. Age group (n) Average lead concentration (1ug/dL) 25 1-2 years (30) 3-4 years (50) 5-6 years (50) 7-8 years (40) 9-10 years (60) 30 35 40 40

A new method for glucose determination in serum (Method A) is to be compared to the established method (Method B). The table below shows the measured glucose concentration by each method for each patient. Is there a difference in the two methods at the 95% confidence interval? Patient1 Patient2 Patient3 Patient4 MethodA(mg/L) 1044 MethodB(mg/L) 1028 720 711 845 820 800 795 Patient5 957 935

The level of mercury in fish is 0.040μg/mL (w/v), that is equivalent to   Group of answer choices 0.040 ppm 4.0 ppb 0.040 mg/mL 4.0 mg/L

Norepinephrine can be analyzed in human urine. A fixed amount of DHBA was added to each sample and standard in a fixed concentration. Please explain the analytical function of adding DHBA. To the 1 mL of urine sample, small amounts of 1 µg/mL norepinephrine standard is added and the following results were obtained. What is the concentration of the norepinephrine in the urine sample with uncertainty?

A study is being performed to see if there is a correlation between the concentration of chromium in the blood and a suspected disease. Blood samples from a group of volunteers with history of the disease are analyzed and compared with the results from the healthy control subjects. From the following results (Table 1), determine whether the differences between the two groups can be ascribed as chance or whether they are real at 95% confident level.

RMR (kcal/day) = (9.99 x 79.5kg) + (6.25 X 182.9cm) - (4.92 x 35) + (166 x 1)- 161

The active ingredient of Benadryl© Chesty Forte Cough Liquid is Guaiphenesin anexpectorant drug used to assist the expectoration ('bringing up') of phlegm from theairways in acute respiratory tract infections. A 200.0 mL bottle of Benadryl© ChestyForte Cough contains 4.00 g of Guaiphenesin (C10H14O4). i. If the recommended dose for a child is 150 mg of Guaiphenesin. What volume of thecough liquid should be administered? ii. If the recommended dose for an adult is 350 mg of Guaiphenesin. How many molesof Guaiphenesin does this equal?

A solution is contaminated with traces of cadmium, manganese, and cobalt. Which option would be the safest way to make it safer for human consumption? ksp OH- CO32- S2- Cd2+ 2.5x10-14 1.8x10-14 8x10-28 Mn2+ 1.6x10-13 5.0x10-10 2x10-53 Co2+ 1.3x10-15 1.0x10-10 5x10-22 A bubble carbon dioxide into the water B raise the pH to about 12 C lower the pH to about 2 D increase the sulfide level

5. The Malaysia National Standard for total amount of lead (Pb) in drinking water is 10 µg/L. Two laboratories reported average results for the analysis of two mineral water samples, which were 2.25 mM (sample A) and 1.05 x 10-5 % (in w/v, sample B). Based on the obtained data, decide if it is safe for you to drink the water?

In the phosphate analysis of a wastewater sample, 30.00 mL of the original sample was taken and diluted with 120.00 mL deionized water. The diluted sample was found to have a phosphate content of 25.5 ppm. What is the phosphate content (in ppm) of the original wastewater sample? DENSITY VALUES AT 25°C Ethanol: 0.789 g/mL Water: 0.997 g/ml Acetic Acid: 1.05 g/mL

CH₂-COOH Citric acid has the formula HO-C-COOH I CH₂-COOH CH2–CDD - Na* + HD-C-CDD- Na CH₂-COO- COO-Na A 25.0 mL sample of a concentrated citrus fruit cordial component (e.g. for lime juice), used in the food & drinks industry, was diluted to 250 mL in a graduated volumetric flask. A 25.0 mL sample of this diluted solution, required, on average, 22.5 mL of a standard 0.100 molar sodium hydroxide solution using phenolphthalein indicator for the titration end-point. A) 0.0075 Assuming all the acid in the cordial was citric acid, calculate the concentration of the acid in g/mL in the original solution. B) 0.576 D and is tribasic acid, forming the tri-sodium salt on complete neutralisation with sodium hydroxide. 1.44 0.00225

25ml of water is used to extract NO ‐1 from A wet soil sample weighing 10 grams. Another sample of 10-gram soil sample is oven dried and found to weigh 5 grams when dry. The [NO ‐1] of the extract is determined to 5mg NO ‐1/ml. What is the NO ‐1 of the soil in the unit's mg of NO ‐1 /g dry soil?

3. Corev was synthesizing a chemical in the laboratory. He used different purification techniques to try to obtain a pure compound. The melting point of the pure compound is 65 degrees. When he tested his compound in the lab the melting point he obtained was 62-68 degrees. Is the product he synthesized pure? 4A company was low on copper metal and decided to use some chemical additives just this once to some copper wiring they were installing in a house. How will this impact the conductivity of the wiring?

Let the ED50 of a recreational drug be defined as the amount required for 50% of a test group to feel high or get a buzz. If the ED50 value of ethanol is 470 mg/kg body mass, what dose would a 70 kg party goer need to quickly consume in order to have a 50% chance of getting a buzz? 235 mg 470 mg 32,900 mg 35,000,000 mg

5.50x10-2 M in acetic acid (Ka = 1.8 x 10-5) and 5.50x10-2 M in hydrocyanic acid (Ka = 4.9 x 10-10) Express your answer to two decimal places. pH = ΜΕ ΑΣΦ ? Submit Previous Answers Request Answer

Today the only form of liquid acetaminophen on the market has a concentration of 160 mg acetaminophen per 5.0 mL. How would you instruct parents of an infant to give a total of 40 mg of acetaminophen to their infant?  Your directions should be clear, not lead to the confusion caused by the physician in the case study, and include the volume of liquid acetaminophen they should give their son.  Please show how you calculated the volume needed to provide 40 mg of acetaminophen.