Answered: A student measured the volume of an…

A student measured the volume of an object 5 times and got the following results. What is the standard deviation? 34.9 mL 34.5 mL 34.2 mL 33.4 mL 35.9 mL

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

ChapterA: Scientific Notation And Experimental Error

Section: Chapter Questions

Problem 8P

See similar textbooks

Related questions

Q: A urine sample had a density of 1.030g/ml. What is the specific gravity of the sample

Q: Which piece of equipment gives the lowest uncertainty Question 15 options: 100 mL beaker 25…

A: There are different type of equipments which can be used to measure the volume of any liquid…

Q: NaOH buret 2nd reading 29,45 32.05 NaOH buret 1st reading 0,02 mL 0.01 mL Slighty derker pinh Light…

A: Formula used : RSD = s ×100x¯ where, RSD = Relative Standard Deviations = Standard Deviation x¯=…

Q: how do i know if my measurement is significantly different from the exact value, at least 2…

A: Given: Exact value : 0.25 Average = 0.223 Standard deviation = 0.025 RSD = 11.2 %

Q: 2. Students measured and recorded the mass of a rock four times. The true mass of the rock is known…

A: Solved in step 2

Q: Round this addition of measurements to proper sig figs: 23 cm + 111.24cm + 0.0045 cm

A: At the time of addition , round off to minimum decimal number.

Q: a sample of sodium carbonate Na2CO3 is being dried. after 1 hour of drying the mass of the sample…

A: Weight of sample before drying =0.337 g Weight of sample after drying = 0.333 g Change in mass =…

Q: How many sig figs are in the following numbers

A: All non-zeros are significant Leading zeros are non-significant whereas trailing zeros are…

Q: 18. A 250.0 kg sample of ore contains 5.91 micrograms of gold. What is the concentration of gold in…

A: The correct option is D

Q: If the readings are 2 3 4 the average deviation is----- O 5.33 O 3.34 O 2.44 0.66

A: Calculate average deviation of the data, 2,3,4

Q: Multiple Choice 017 0.015 0.062 050 012

A: Here the half life of 90Sr is 29 year. We have to determine the fraction of 90Sr left after 175…

Q: 190g = 0.42lb How does your experimental factor compare to the standard conversion factor of 454…

A: Given: Experimental relation => 190 g = 0.42 lb.

Q: Discuss the Steps in Scientific Methods as mostly used in the content area of Chemistry.

Q: 1. The mass of a 45.750 g piece of copper is measured three times on two different balances with the…

Q: Give two examples of the Personal Error (one of the classification of systematic error). Please do…

A: Personal errors are types of operational errors that arise due to personal limitations of the person…

Q: CDCI3 240 QE-300 180 220 200 160 140 120 100 80 60 20 12 11 10 3 2

A: Note: m/z = 43 indicates isopropyl group. From IR 2800 cm-1, 2700 cm-1 aldehyde C-H stretch.…

Q: A certain data set has low accuracy, but high precision. Which of the following statements about…

A: There is very little random and systematic error. Because random error causes one measurement to…

Q: Which of the following statements about the sensitivity of an analytical method is true? O The…

A: Two questions based on tools in analytical chemistry that is to be accomplished.

Q: Does standard deviation give a measure of precision or accuracy?

A: Interpretation - Does standard deviation give a mesure of precision or accuracy - Introduction…

Q: You have measured the mass of samples A,B,C,D, and E on the analytical balances in our chemistry…

A: ∵ Standard deviation S=ΣXi-X2n-1Where , X=sample average Xi=Individual values in…

Q: Sample 1 precision (relative standard deviation): Sample 1 accuracy (relative error): Sample 2…

Q: Write the following in Standard form

A: Standard form is used for writing very large numbers or very small numbers

Q: 18 mm -~ 2 PPM 36 mm 36 mm

A: The technique which is used to determine the structure of an unknown compound by analyzing the peaks…

Q: Explain the difference between: d. absolute and relative error e. population mean and sample mean…

A: Explain the difference between: d. absolute and relative error e. population mean and sample mean f.…

Q: Turn into scientific notation using dimensional analysis then solve problem

Q: How many of the following should be included in a good hypothesis? (1) A prediction of the results…

A: A hypothesis can be defined as a proposed explanation for a phenomenon that has been observed.

Q: A molecular biologist measures the mass of cofactor A in an average yeast cell. The mass is 64.22…

A: Metric conversion factors are used to convert the units of numbers. Some of the factors that can be…

Q: 123.54 cm - 121.91 cm) * (0.5487 cm) = _________________cm2

Q: What are the similarities in random error and systematic error? In analytical method and graphical…

A: Answer - Random error - Random error is a chance difference between the observed and true values of…

Q: physical and chemical methods are one of the quantitative analysis .A True .B False .C .D

Q: Increasing the number of measurements will decrease the standard deviation increase the systematic…

A: Error formula is the absolute value of the difference of the measured value and the actual value…

Q: How much (mL) silver nitrate is required for the standardization? 4.995 49.950 49.590 45.990

A: Weight of silver chloride (ppt) = 0.750 g MW of silver nitrate = 169.87 g/mL MW of silver chloride =…

Q: 100- 98- 96- 94- 92- 90- 88- 86 84 82 80 78- 76+ 4000 3533 Aña 3402.5 3500 3002.41cm-1 2916.20pm-1…

A: The IR tells about The functional group present in the molecules.

Q: 3C: C5H10O2 100 88 68 40 4.0 3H 2500 2H 2008 2.0 1741 2H illu 1437 1500 1259- 1197 3H num T 0.5 PPM

A: The correct answer is given below

Q: Weight of coin 1 (g) 11.4286 Weight of coin 2 (g) 11.4633 Weight of coin 3 (g)…

A: Solution -

Q: A manufacturer’s process for analyzing aspirin tablets has a known variance of 25. A sample of 10…

A: It is given that 10 data are given, the evidence has a significant difference with the sample test…

Q: The number of hectograms (hg) in 3.95 x 104 cg is

A: Given: The mass of a substance is given = 3.95 x 104 cg where cg stands for 'centigram'

Q: The Covid-19 virus has an average size of 0.3 micrometers. What is the average size of the virus in…

A: Average size of virus = 0.3 micrometres Average size of virus (in centimetres) = ?

Q: Alie measures out a sample of naphthalene using a graduated cylinder. She reads the measurement as…

Q: Calculate the percent error in the calculated density. Show your work. % emr = [Measured valeu-…

A: Trial Volume of water (ml) Mass of water (g) Density of water (D) (g/ml)=Mass/volume D-X (D-X)2 1…

Q: Which of the following is NOT true about constant weighing in the experiment? It involves a cycle of…

Q: student weighed 10 pennies on a balance and recorded the following masses: 3.112 g, 3.109 g,…

A: Outliers are data reports that stand out from the rest in at least one way.

Q: A method of analysis yields masses of gold that are low by 0.4 mg. Calculate the percent relative…

A: Percent relative error is calculated as follows; Er=xf-xixi×100% Here xi is the actual mass of the…

Q: Atomic absorption analysis for copper concentration of aircraft engine oil gave a value of 8.53 mg…

A: GIVEN Copper concentration of aircraft = 8.53 mg Cu/mL standard deviation (s) = 0.22 mg Confidence…

Q: Standard Deviation (mg CaC03/L water sample)

A: The standard deviation in the values of hardness (in mg CaCO3/L water sample) is to be determined.…

Q: An intensive property is one which does vary with the amount of substance, such as volume. does not…

A: Generally intensive property does not scale with system size.

Q: Which statement is true? Question 12 options: Precision is measured by standard deviation.…

A: Precision and accuracy are required any measurements.

Q: Use dimensional analysis to convert the volume for the English measurements of tablespoon and…

A: Dimensional analysis is the study of relation between physical quantities based on their units and…

Question

A student measured the volume of an object 5 times and got the following results. What is the standard deviation?

34.9 mL 34.5 mL 34.2 mL 33.4 mL 35.9 mL

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 2 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

A piece of metal was weighed on a laboratory balance four times and gave the following results: 15.75, 15.72, 15.79, and 15.76 g. Determine the average mass and the standard deviation.
To the correct number of significant figures, what are the average and standard deviation of the following four numbers? 7.159 7.024 7.183 7.005
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 standard deviation of the glucose concentration on Month 1? 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 16.48 16.77 17.2 22.18
The density of an irregular shaped object was measured three times with the following results: 2.15 g/cm3 2.79 g/cm3 1.98 g/cm3 How would you report the mean and standard deviation of this data? a. 2.31 g/cm3 ± 0.07 g/cm3 b. 2.307 g/cm3 ± 0.1 g/cm3 c. 2.4 g/cm3 ± 0.5 g/cm3 d. 2.15 g/cm3 ± 0.03 g/cm3 e. 2.3 g/cm3 ± 0.4 g/cm3
2. A study of body mass index (BMI) in adults showed that for men aged 40–44, the mean BMI level is 26.7 with a standard deviation of 3.7. Assuming a normal distribution, what percentage of men in this age group have a BMI between 30.0 and 35.0?
If the mean value of certain set of eight measurements was 45.74, and standard deviation S=0.35. What is the confidence interval at 95% confidence level for the mean?
The following data was reported for the density of a soft drink (pop). The true density of the pop is 1.063 g/mL. Trial # Density (g/mL) 1 0.965 12 0.926 13 1.399 4 0.832 1.032 6. 1.237 Average: 1.065 Standard Deviation: 0.213 Which ONE of the following statements is TRUE about the data? OThe data is precise, but not accurate. The data is accurate, but not precise. The data is neither precise, nor accurate. It is impossible to determine the accuracy or precision of the provided data. LO
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?
Two methods were used to measure the arsenic level (ppb) in drinking water. Quantity Method I Method II Mean arsenic concentration (ppb) Standard deviation (ppb) Number of measurements 1.382 0.025 1.346 0.039 4 4 F calculated=? Are the standard deviations significantly different? I calculated=? Are the means significantly different?
There samples of the same metal are weighed and their masses are found to be 42.02 g.4.63 g, and 44.16g. The corresponding volumes are 455 ml., 5.11 ml., and 4.84 m., respectively. Determine the density, d, of the metal and calculate the standard deviation of the density. d= The densities of several metals are given in the table. Metal (g/cm) aluminum 2.70 iron 7.87 cobalt 8.90 copper 8.96 gold 19.3 glemt Which of the metals could the sample be? gold cobalt D aluminoun copper g/cm³
I am supposed to calculate Average absolute deviation (%). I am not sure if 7.16 is the final answer, or do i need to multiply by 100 because they are asking for percent?
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%.