Boiling Points - Individual Report Template

Refer to the table below. Answer the questions that follow. Express all your answers in four decimal places. Note: Do not round off the values of the slope and the y-intercept.Please keep your units consistent while calculating for the answers. Enclose in a box/highlight your final answers.  answer letter B

Q 1 thank you!

3. A chemist used two different methods to measure the number of mg of Fe in five iron(II) sulfate supplement tablets. The results of each are shown below. 64.71mg Method 1: 65.03mg 61.55mg 64.9 mg 65.1 mg Method 2: 65.5 mg 66.1mg Calculate the average amount determined by each method as well as the standard deviation and RSD for each method. 63.07mg 65.4mg 67.15mg Which method gave more precise results? How do you know? Is it possible to know which method is more accurate? Why or why not?

Six measurements are obtained for the mass of water delivered by a calibrated volumetric pipet: 4.518 g, 4.521 g. 4.520 g. 4.526 g, 4.518 g, and 4.521 g. Use a spreadsheet to determine the mean and 95% confidence interval of these measurements. mean: 95% confidence interval: %23

To determine the organic material in a dried lake bed, the percent carbon by mass is measured at two different locations. To compare the means of the two different locations, it must first be determined whether the standard deviations of the two locations are different. Location 1 standard deviation: 0.050 Location 2 standard deviation: 0.34 What is the calculated ? value for comparing the standard deviations?

8. Assuming that an experiment's results are 10.1, 10.4, and 10.6, find the mean, the average deviation from the mean, the standard deviation from the mean, and the relative deviation from the mean. AYAW

Look for the mean and standard deviation. Show the answer in a step-by-step manner.

The gold content of an ore is being measured. The results of these analyses are:  Content (ppt) 20.065 19.999 21.054 20.533 20.088 20.112 What is the average value, standard deviation and confidence interval for this set of data?Show each step of the calculation. Using your results calculate the %accuracy and %precision (relative standard deviation) if the true value is 20.045%.

1. Using Excel, set up a spreadsheet with the following data and prepare a graph which includes a linear regression analysis with the trendline displayed on the graph: Time(sec) Temp (°C) 30.0 27.3 60.0 40.2 90.0 53.7 120.0 67.4 150.0 79.8 180.0 91.3

Location 1 (% C) To determine the organic material in a dried lake bed, the percent carbon by mass is Sample Location 2 measured at two different locations. To compare the means of the two different locations, it must first be determined whether the standard deviations of the two locations (% C) 60.40 60.10 are different. 60.20 60.90 For each location, calculate the standard deviation and report it with two 60.30 60.20 significant figures. 4 60.40 60.70 60.20 60.30 location 1 standard deviation: location 2 standard deviation: What is the calculated F vae for comparing the standard deviations? Fale = Are the standard deviations for the two locations significantly different at the 95% confidence level? O no O yes What is the calculated i value used to compare the means of these two locations? I cale = Are the means for the two different locations significantly different at the 95% confidence level? O no O yes tv hulu

How do I find the average deviation and the percent error?

Consider the following sets of replicate measurements: Calculate the mean and the standard deviation for each of these six data sets. Calculate the 95% confidence interval for each set of data. What does this interval mean?

A student determines the concentration of an unknown sample using two different methods. Each method has three different trials; the average, standard deviation and percent error produced by each method is listed below. Method 1 Average: 10.56 M NaOH Standard deviation: 1.35 M NaOH Percent error: 1.25% Method 2 Average: 10.92 M NaOH Standard deviation: 1.02 M NaOH Percent error: 3.45% Which method was more precise? How can you tell?

For the following data, calculate mean, deviation, standard deviation, median, variance and range ( 14.2273, 14.2301, 14.2272, 14.2296, 14.2287 *

Answer only question 4 and 5. Thank you

Which of the statements below are TRUE regarding the mean and standard deviation? I.    As the number of measurements increases, x̄ approaches μ if there is no random error.II.    The square of the standard deviation is the average deviation.III.    The mean is the center of the Gaussian distribution.IV.    The standard deviation measures the width of the Gaussian distribution.

Write A if only statement A is true; Write B if only statement B is true; Write C if both statements A and B are true; Write D if both statements A and B are false.   ______ (1) A. The scientific paper provides information about a chemical's toxicity, health hazards, physical properties, fire, and reactivity data—including storage, spill, and handling precautions.  B. Chemicals and other hazardous materials are an integral component of the laboratory environment.   ______ (2) A. The skull and crossbones signage indicates corrosive substances. B. Globally Harmonized System Pictograms illustrates different signages in relation to safety and proper handling of certain chemicals.

Weight of coin 1 (g) 11.4286 Weight of coin 2 (g) 11.4633 Weight of coin 3 (g) 11.4632 Weight of coin 4 (g) 11.5468 Weight of coin 5 (g) 11.5691 Mean (g) 11.4942 SD 0.0604068290841 %RSD 0.53% Check for suspicious outliers by using the Grubb’s test.

Suppose a normally distributed set of data with 8900 observations has a mean of 123 and a standard deviation of 16. Use the 68-95-99.7 Rule to determine the number of observations in the data set expected to be above a value of 107. Round your answer to the nearest whole value. Hint: This problem is asking for how many observations not the percent. Answer Tip: Don't round any probabilities or percentages in your calculations. Keep all decimal places and round at the END of the problem.

Part B What mass of ethyl alcohol is formed by the addition reaction of water and 475 g of ethylene? Express your answer with the appropriate units to three significant figures. HA ? m(CH3CH2OH) = Value Units Submit Request Answer Provide Feedback APR 19 étv MacBook Air

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A student determines the concentration of an unknown sample using two different methods. Each method has three different trials; the average, standard deviation, and percent error produced by each method is listed below. Method 1 Average: 10.56 M NaOH Standard deviation: 1.35 M NaOH Percent error: 1.25% Method 2 Average: 10.92 M NaOH Standard deviation: 1.02 M NaOH Percent error: 3.45% Which method was more accurate? How can you tell?

Please help me find the standard deviation for the given data.

Using the table complete the correct value and percent error

For the data set, calculate the mean, standard deviation, and variance. mean: \table[[Sample, Value ],[1,4.028], [2,4.011], [3, 4.013], [4, 4.029], [5, 4.017], [6, 4.012]] standard deviation: variance: Ⓒ Macmillan Learning mean: For the data set, calculate the mean, standard deviation, and variance. standard deviation: 3 variance: C Sample 1 2 3 4 5 6 Value 4.028 4.011 4.013 4.029 4.017 4.012

Using the volumes :22.97 mL, 22.86 mL, 22.89 mL, 22.92 mL Calculate the mean (average) volume mL Calculate the % relative average deviation % Calculate the standard deviation (2 decimal places) Calculate the % relative standard deviation of the mean value decimal place) % (1

1. Certified Reference Material (CRM), GSS-5, is certified to contain 40.67 ± 3.33 mg/kg of Ni in soil. An analysis of the CRM gives values of 40.39, 41.98, 43.64, 44.38, and 45.96 mg/kg. Determine the tcalc. value and determine if your results differ from the expected results at the 90 % confidence level?

Estimate the absolute deviation and coefficient of variation. (The numbers in parentheses are absolute standard deviations)

20 Mercury analysis results performed on a drinking water sample are given in the table below. 13 15 Analysis No1 Mercury (ppb) 54.1 55.5 63.8 54.4 55.8 57.9 Which value is the average with the 90% confidence interval? (t = 2.02, s = 3.63) a) O 56.9 ± -3.0 b) O 56.9 + -2.8 C) O 55.9 ± -3.0 d) O 56.9 ± -3.1 O Boş bırak

Need help with dimesional analysis

Using the following data set, calculate the average and the standard deviation to the correct number of significant figures and decimal places. 1.12%, 2.135%, 1.9855%, 1.33%, and 1.7544% 2. +0.43% 1.66 0.08 % O 1.66 0.4 % 1.7 +0.4 % O 1.66 0.43 %

A student measured the melting point range of an unknown solid to be 81.9 to 82.3 degrees celsius. a) Is the compound pure? b) Can you identify the compound from Table 2.2? c) If yes, what is the compound? Table 2.2: Solid - Melting Point (Celsius) Benzoic Acid - 122 Acentanilide - 114 Acetamide - 82 Biphenyl - 71 p-Dimethoxybenzene - 59 p-Dichlorobenzene - 54 Benzophenone - 48