17NEW June 20 2019. Analysis of several plant food preparations for the content of organics yielded the following data: 16.40, 16.36, 16.26 and 16.34%. The true value is 18.50%. The results of this analysis are, Select one: a. Inaccurate but Precise b. Accurate and precise C. Accurate and imprecise d. Inaccurate and imprecise

17NEW June 20 2019. Analysis of several plant food preparations for the content of organics yielded the following data: 16.40, 16.36, 16.26 and 16.34%. The true value is 18.50%. The results of this analysis are, Select one: a. Inaccurate but Precise b. Accurate and precise C. Accurate and imprecise d. Inaccurate and imprecise

Introductory Chemistry: A Foundation

8th Edition

ISBN:9781285199030

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter1: Chemistry: An Introduction

Section: Chapter Questions

Problem 11ALQ

See similar textbooks

Similar questions

Please let me know which 2 answers are correct, an explanation including evidence
Based on a grade 11 chemistry student, answer the following question based on the provided tables: Part G: Final Identification of the Poison By this time, Tylenol has been pulled off the shelves at all of the stores in the area and a nationwide recall has been announced. Several suspicious capsules have been found and tested. The contents of the capsules contain a compound with a nitrogen content of greater than 15% and a carbon content of less than 50%. What is the poison in the capsule? Provide calculations to support your answer.
Mass of original mixture: 0.280g Mass of naphthalene recovered: 0.160 g Mass of 3-nitroaniline recovered: 0.015 g Mass of benzoic acid recovered: 0.135 g 1. a) calculate % by mass of naphthalene, 3-nitroaniline and benzoic acid in original sample 1. b) calculate total mass of three recovered components (g) 1. c) calculate total percent recovery (%)
1. 500.0 mL 0.2 M KI2. 500.0 mL 0.2 M KCl3. 500.0 mL 0.1 M K2S2O84. 500.0 mL 0.1 M K2SO45. 500.0 mL 4.0 mM Na2S2O3 (from Na2S2O3∙5H2O)pls compelete the 2nd table given the data
A clinic had 25 patients on Friday morning. If 21 patientswere given flu shots, what percentage of the patientsreceived flu shots? Express your answer to the ones place.
Two methods measured the Cdse content (g/L) of six different samples of nano-crystals. Do the two methods differ significantly at the 95% confidence level
Use the notes on the green page to help. Use CER, Claim-answer to the question, reasoning-why its drawn correctly, evidence- to show why the others are incorrect. Answer completely.
You work in a research organization that is looking for markers of various diseases that can be used as a diagnostic for the disease. It has been reported in the past that high levels of Cu are found in the sweat of people with cystic fibrosis. One of the research projects is focused on looking for high levels of Cu in samples that can be obtained non-invasively such as saliva, sweat, hair, nails, etc. The lab will analyze large samples for Cu. What instrument would you recommend purchasing to support this work, Atomic absorption spectrophotometer or an inductively coupled plasma atomic spectrophotometer? Explain the basis for your decision.
pls complete the 2nd table given the data1. 500.0 mL 0.2 M KI2. 500.0 mL 0.2 M KCl3. 500.0 mL 0.1 M K2S2O84. 500.0 mL 0.1 M K2SO45. 500.0 mL 4.0 mM Na2S2O3 (from Na2S2O3∙5H2O)
What is the average ratio in this chart? Please show me the calculation too! Sample 1 2 3 Calculations for sample 1 Mass of aluminum dish 1.24g 1.26g 1.24g - Mass of aluminum dish + Epsom salt 1.70g 1.94g 1.80g - Epsom salt, original (hydrated) mass 0.46g 0.68g 0.56g 1.70g – 1.24g = 0.46g Mass of aluminum dish + Epsom salt after heating 1.42g 1.62g 1.61g Epsom salt, heated (dehydrated) mass 0.18g 0.36g 0.37g 1.42g- 1.24g = 0.18g Mass of water 0.28g 0.32g 0.19g 0.46g – 0.18g = 0.28g Moles of magnesium sulfate 0.0015mol 0.0030mol 0.0031mol 0.18g x (1mol/120.37g)= 0.0015mol Moles of water 0.016mol 0.018mol 0.011mol 0.28g x (1mol/18.02g) = 0.016mol Ratio of moles water: moles of magnesium sulfate 32:3 18:3 11:3.1 0.016 : 0.0015= 32:3 Average Ratio
The pencil's "lead" main element is: a. C b. Sn c. Ld d. Pb I need explanation in a research way. Please don't base the answer to any articles that can be seen in google instead base it with a research paper or any studies with authors. Book-supported is also okay.
Narrate your observations in the video experiment. Indicate your inferences in your observations. https://www.youtube.com/watch?v=2XBrj-ZEnEo