Two students determine the percentage of lead in a sample as a laboratory exercise. The actual percentage of lead in the sample is 3.51 % . The students' performed 3 trials each and obtained the following results: Student Trial 1 Trial 2 Trial 3 1 3.21 3.22 3.13 3.30 3.51 3.82 a) What is the average of the three trials performed by Student 1? Lead Content b) What is the average of the three trials performed by Student 2? Lead Content c) Which of the two students was more accurate? Student 1 Student 2 2.

Two students determine the percentage of lead in a sample as a laboratory exercise. The actual percentage of lead in the sample is 3.51 % . The students' performed 3 trials each and obtained the following results: Student Trial 1 Trial 2 Trial 3 1 3.21 3.22 3.13 3.30 3.51 3.82 a) What is the average of the three trials performed by Student 1? Lead Content b) What is the average of the three trials performed by Student 2? Lead Content c) Which of the two students was more accurate? Student 1 Student 2 2.

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter1: Basic Concepts Of Chemistry

Section: Chapter Questions

Problem 3RCYU

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Concept explainers

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.

Question

Two students determine the percentage of lead in a sample as a laboratory exercise. The actual percentage of lead in
the sample is 3.51 % . The students' performed 3 trials each and obtained the following results:
Student
Trial 1
Trial 2
Trial 3
1
3.21
3.22
3.13
2
3.30
3.51
3.82
a) What is the average of the three trials performed by Student 1?
Lead Content
%
b) What is the average of the three trials performed by Student 2?
Lead Content
%
c) Which of the two students was more accurate?
Student 1
O Student 2

d) What is the precision of the data obtained by Student 1?
Precision
e) What is the precision of the data obtained by Student 2?
Precision
f) Which of the two students is more precise?
Student 1
Student 2

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