Interpretation:
Uncertainty in the measurement
Concept Introduction:
In scientific work, large and very small numbers occurs frequently. But it is been observed that, to record these vast numbers or very small numbers is difficult because, the numbers may get missed while recording them. It is time consuming and the possibilities of error occurrence are also high. Hence to overcome these demerits, a method called scientific notation is used. In this method the numbers are expressed in form of “
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General, Organic, and Biological Chemistry
- The density of table sugar is 1.59 g/mL. It is true that... A.2.00 g of table sugar occupies a volume of 1.17 mL B. 5.00 g of table sugar occupies a volume of 3.14 mL C. No correct response D. 3.00 g of table sugar occupies a volume of 1.97arrow_forward20 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 bırakarrow_forwardin quantitative chemistry experiment error. If the calculated answer is 3.141592... but 3.14 considering significant figure and calculated uncertainty is +-0.002 , then do I need to write answer as 3.140(+-0.002) or 3.142(+-0.002)arrow_forward
- ot Visited The number 39.00671 rounded to 3 significant figures is: The number 801.0013 rounded to 5 significant figures is: The number 5183.340 rounded to 3 significant figures is: Submit Answer Retry Entire Group 6 more group attempts remainingarrow_forwardPeople Tab Window Help ubmission History: 2. X 101 Chem101 E AWR prep 5 Google Docs Question 15 of 17 An atom of a particular element has a volume of 7.8 x 10-31 m3 What is this volume in cubic nanometers ? ADD FACTOR ANSWER RESET *( ) %3D 10° 10-6 (10-6)3 7.8 x 10 22 (10°)a (1)3 106 7.8 x 10 31 7.8 x 10-4 1 10-9 7.8 x 104 (10°)a nm nm3 um m3 um3 FEB 6. 3. tvarrow_forwardstion 3 The average of 64 results is how many more times reliable than the average of 4 results ? et answered. ed out of 2.00 Select one g question a. 2 Ob 8 ho o C. 4 Od 16arrow_forward
- Perform the calculation and record the answer with the correct number of significant figures. (34.123 +4.20) (98.76546.639) F4 Z $ F5 010 % = A F6 F7 & F8 F9 Ale A- F10 !!! A+ F11 Pause ] F12 Scr Lk PrtSc SysRq +arrow_forwardWhich of the following is NỘT an equivalent expression for the confidence interval given by 161.7arrow_forward2. Express the number 500 cm so it is clear that there are only two significant figures. 5.0 x10? Problems 1. The mass of a gold coin was measured three times and each measurement was made to five digits. The mass values were 23.319 g, 23.341 g, and 23.296 g. The average mass was reported as 23.32 g–The actual mass of the coin is 25.5631 g. a. Are the measurements precise? Explain your answer. b. At what place value is the repeated measurement no longer reproducible (uncertain)? c. Why is the average mass of the gold coin reported to only four significant figures? d. Are the measurements accurate? Explain your answer. acce e. What is the accuracy (percent error) of the average of the three measurements? f. Why is the following statement not considered a description of accuracy? "The differences between each measurement is small, so the data is really accurate".arrow_forwardIncreasing the number of measurements will decrease the standard deviation increase the systematic error increase the random error a) 1 & 2 b) 1 only c) 2 & 3 d) 2 only e) 1, 2, & 3arrow_forwardWhat is the answer to the following problem? (17 x 240) + 8.3 Please use the correct number of significant figures. a. 4100 b. 4090 c. 4088 d. 4088.3 SIG FIG MULT/DIV RULE: round to least number of sig figs SIG FIG ADD/SUB RULE: round to least number of decimal places My TA wants us to not round anything until the last step and the last step normally determines the answer, but I’m still confused - how do I follow both of the rules at once?arrow_forwardAnswer Sp x 101 Chem101 Question 19 of 19 A geriatric patient is prescribed 20.0 mg/day for Alzheimer's disease. Memantine pills are available in 5.00 mg/capsule . How many capsules should the patient be taking over 14 days ? ADD FACTOR ANSWER RESET *( ) 20.0 800 56.0 5.00 2.00 0.01 0.001 100 80.0 200 0.1 7.10 1 14 3.50 4.00 10.0 1000 g Memantine mg/day capsules mg/capsule mg Memantine days DELLarrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningChemistry: Matter and ChangeChemistryISBN:9780078746376Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl WistromPublisher:Glencoe/McGraw-Hill School Pub Co