- Arts & Culture 6213
- Business & Economics 674
- Computers 316
- Dictionaries & Encyclopedias 74
- Education & Science 76877
- Abstracts 73
- Astrology 4
- Biology 8
- Chemistry 4046
- Coursework 15549
- Culture 8
- Diplomas 316
- Drawings 1595
- Ecology 5
- Economy 76
- English 80
- Ethics, Aesthetics 3
- For Education Students 17573
- Foreign Languages 11
- Geography 3
- Geology 1
- History 88
- Maps & Atlases 5
- Mathematics 12624
- Musical Literature 2
- Pedagogics 19
- Philosophy 22
- Physics 15120
- Political Science 5
- Practical Work 59
- Psychology 63
- Religion 4
- Russian and culture of speech 8
- School Textbooks 7
- Sociology 9
- Summaries, Cribs 87
- Test Answers 160
- Tests 8747
- Textbooks for Colleges and Universities 32
- Theses 7
- To Help Graduate Students 14
- To Help the Entrant 38
- Vetting 385
- Works 13
- Информатика 8
- Engineering 893
- Fiction 706
- House, Family & Entertainment 84
- Law 129
- Website Promotion 68
30. Solving a chemistry problem
Content: 12.rar 38,12 kB
Product description
12. Quality control of the piracetam preparation (substance) for the content of the sum of foreign impurities W (mass fraction) in it gave the following results in five parallel determinations. %: 0.45; 0.48; 0.50; 0.52; 0.55. The true value of the content of foreign impurities is mu=0.50%. Characterize the reproducibility of the results obtained by calculating the confidence interval of the mean, with a confidence probability of P=0.95 and the presence or absence of a systematic error. Answer: W±ΔW=(0.50±0.05)%. The true value of 0.50% lies within the confidence interval of the mean. There is no systematic error. The method gives correct results.
Additional information
If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.
Feedback
0| Period | |||
| 1 month | 3 months | 12 months | |
| 0 | 0 | 0 | |
| 0 | 0 | 0 | |