MASTERING CHEMISTY NVCC ACCESS CODE
1st Edition
ISBN: 9780136444459
Author: Tro
Publisher: PEARSON
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Chapter E, Problem 7E
Explain the difference between precision and accuracy.
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Give an example from which the difference of Accuracy and Precision is described and explain why it is so
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Chapter E Solutions
MASTERING CHEMISTY NVCC ACCESS CODE
Ch. E - What are the standard SI base units of length,...Ch. E - What are the three common temperature scales? Does...Ch. E - What are prefix multipliers? List some examples.Ch. E - What is a derived unit? List an example.Ch. E - Explain the relationship between the reliability...Ch. E - What is the significance of the number of digits...Ch. E - Explain the difference between precision and...Ch. E - Prob. 8ECh. E - When multiplying or dividing measured quantities,...Ch. E - When adding or subtracting measured quantities,...
Ch. E - Explain the difference between density and mass.Ch. E - Explain the difference between intensive and...Ch. E - Prob. 13ECh. E - Prob. 14ECh. E - Prob. 15ECh. E - Prob. 16ECh. E - What is dimensional analysis?Ch. E - How should units be treated in calculations?Ch. E - Convert each temperature. a. 32 °F to °C...Ch. E - Convert each temperature. a. 212 °F to °C...Ch. E - The coldest temperature ever measured in the...Ch. E - Prob. 22ECh. E - Use the prefix multipliers to express each...Ch. E - Use prefix multipliers to express each measurement...Ch. E - Use scientific notation to express each quantity...Ch. E - Use scientific notation to express each quantity...Ch. E - Complete the table.Ch. E - Complete the table.Ch. E - Express the quantity 254,998 m in each unit. a. km...Ch. E - Express the quantity 556.2 × 10-12 s in each unit....Ch. E - How many 1-cm squares does it take to construct a...Ch. E - How many 1-cm cubes does it take to construct a...Ch. E - Convert 15.0 L to each unit. a.mL b. cm3 c. gal d....Ch. E - Convert 4.58 x 103 cm3 to each unit. a. L b. mL c....Ch. E - A ruler used to measure a penny has markings every...Ch. E - A scale used to weigh produce at a market has...Ch. E - Read each measurement to the correct number of...Ch. E - Read each measurement to the correct number of...Ch. E - For each number, underline the zeroes that are...Ch. E - For each number, underline the zeroes that are...Ch. E - How many significant figures are in each number?...Ch. E - How many significant figures are in each number?...Ch. E - Which numbers are exact (and therefore have an...Ch. E - Indicate the number of significant figures in each...Ch. E - Round each number to four significant figures. a....Ch. E - Round each number to three significant figures. a....Ch. E - Calculate to the correct number of significant...Ch. E - Calculate to the correct number of significant...Ch. E - Calculate to the correct number of significant...Ch. E - Calculate to the correct number of significant...Ch. E - Calculate to the correct number of significant...Ch. E - Calculate to the correct number of significant...Ch. E - A new penny has a mass of 2.49 g and a volume of...Ch. E - A titanium bicycle frame displaces 0.314 L of...Ch. E - Glycerol is a syrupy liquid used in cosmetics and...Ch. E - An allegedly gold nugget is tested to determine...Ch. E - Ethylene glycol (antifreeze) has a density of 1.11...Ch. E - Prob. 58ECh. E - A small airplane takes on 245 L of fuel, If the...Ch. E - Human fat has a density of 0.918 g/cm3. How much...Ch. E - Perform each unit conversion. a. 27.8 L to cm3 b....Ch. E - Prob. 62ECh. E - Prob. 63ECh. E - Prob. 64ECh. E - A runner wants to run 10.0 km. She knows that her...Ch. E - Prob. 66ECh. E - A European automobile has a gas mileage of 17...Ch. E - A gas can holds 5.0 gallons of gasoline. Express...Ch. E - A house has an area of 195 m2. What is its area...Ch. E - Prob. 70ECh. E - The average U.S. farm occupies 435 acres. (1 acre...Ch. E - Total U.S. farmland occupies 954 million acres....Ch. E - An acetaminophen suspension for infants contains...Ch. E - An ibuprofen suspension for infants contains 100...Ch. E - Convert between energy units. a. 534 kWh to J b....Ch. E - Prob. 76ECh. E - Suppose that a person eats 2387 Calories per day....Ch. E - A particular frost-free refrigerator uses about...Ch. E - Prob. 79ECh. E - Prob. 80ECh. E - A solid gold cylinder sits on a weight-sensitive...Ch. E - The proton has a radius of approximately 1.0 ×...Ch. E - The density of titanium is 4.51 g/cm3. What is the...Ch. E - The density of iron is 7.86 g/cm3. What is its...Ch. E - A steel cylinder has a length of 2.16 in, a radius...Ch. E - A solid aluminum sphere has a mass of 85 g. Use...Ch. E - Prob. 87ECh. E - Prob. 88ECh. E - The Toyota Prius, a hybrid electric vehicle, has a...Ch. E - The Honda Insight, a hybrid electric vehicle, has...Ch. E - The single proton that forms the nucleus of the...Ch. E - A sample of gaseous neon atoms at atmospheric...Ch. E - Prob. 93ECh. E - The world’s record in the 100-m dash is 9.58 s,...Ch. E - Table salt contains 39.33 g of sodium per 100 g of...Ch. E - Prob. 96ECh. E - A length of #8 copper wire (radius = 1.63 mm) has...Ch. E - Rolls of aluminum foil are 304 mm wide and 0.016...Ch. E - Liquid nitrogen has a density of 0.808 g/L and...Ch. E - Mercury is often used in thermometers. The mercury...Ch. E - Prob. 101ECh. E - In 1999, scientists discovered a new class of...Ch. E - Prob. 103ECh. E - Nanotechnology, the field of building ultrasmall...Ch. E - Prob. 105ECh. E - A box contains a mixture of small copper spheres...Ch. E - A cube has an edge length of 7 cm. If it is...Ch. E - Prob. 108ECh. E - For each box, examine the blocks attached to the...Ch. E - Look up the measurement of the approximate...Ch. E - Prob. 111ECh. E - One inch is equal to 2.54 cm. Draw a line that is...Ch. E - Convert the height of each member in your group...Ch. E - Prob. 114ECh. E - Convert 85.0 °F to k. 358 k 181.1 k 302.6 k 29.4 kCh. E - Express the quantity 33.2 × 10-4 m in mm. 0.332 mm...Ch. E - How many significant figures are there in the...Ch. E - Perform the calculation to the correct number of...Ch. E - Perform the calculation to the correct number of...Ch. E - What is the mass of a 1 .75-L sample of a liquid...Ch. E - Convert 1,285 cm2to m2. 12.85 m2 0.1285 m2 1.285 ×...Ch. E - Prob. 8SAQCh. E - A solid metal sphere has a radius of 3.53 cm and a...Ch. E - A German automobile’s gas mileage is 22km/L....Ch. E - A wooden block has a volume of 18.5 in3. Express...
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- A student determined the density of a solid to be 2.90, 2.91 and 2.93 g•cm–3. If the actual density of this solid is 2.70g•cm-3, how should the student's results be described?a. High accuracy and high precisionb. Low accuracy and high precisionc. High accuracy and low precisiond. Low accuracy and low precisionarrow_forwardWhat would be the difference in precision and accuracy if I chose to use a graduated cylinder instead of a buret? Explain.arrow_forwardA student performed an analysis of a sample for its calcium content andgot the following results: 14.92% 14.91% 14.88% 14.91%The actual amount of calcium in the .sample is 15.70%. What conclusions can you draw about the accuracy and precision of these results?arrow_forward
- Distinguish between the terms accuracy and precision.In general, explain why a precise measurement does notalways guarantee an accurate result.arrow_forwardA certain data set has low accuracy, but high precision. Which of the following statements about error is most consistent with the data set? O there is very little random and systematic errors O there is a lot of both random and systematic errors O there is a lot of systematic error and very little random error O there is a lot of random error and very little systematic errorarrow_forwardQ2. Please answer with legible handwriting and go step by step if possible. Box answers for a,b,c,d once finished, thank you.arrow_forward
- Express (7.64x10^5) g in SI base units using scientific notation.arrow_forwardnumber 3 and 4 of this part ty in analytical chemarrow_forwardA volumetric flask that is to be used to measure volume is supposed to be marked at 10.00 ml but is actually marked at 9.95 ml. This error affects its precision. True or false? please explainarrow_forward
- Is it possible for measured data to be precise but inaccurate?arrow_forwardTwo students determine the percentage of lead in a sampleas a laboratory exercise. The true percentage is 22.52%. Thestudents’ results for three determinations are as follows:(1) 22.52, 22.48, 22.54(2) 22.64, 22.58, 22.62(a) Calculate the average percentage for each set of data andstate which set is the more accurate based on the average.(b) Precision can be judged by examining the average of thedeviations from the average value for that data set. (Calculatethe average value for each data set; then calculate the averagevalue of the absolute deviations of each measurementfrom the average.) Which set is more precise?arrow_forwardIt is necessary to take into account the proper number of significant figures when taking a measurement in the laboratory. This is dependent on the precision of the measuring instrument. True Falsearrow_forward
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