Skip to main content
Ch.2 Chemistry and Measurements
Timberlake - Chemistry: An Introduction to General, Organic, and Biological Chemistry 14th Edition
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoTimberlake 14th EditionCh.2 Chemistry and MeasurementsProblema 19b
Capitolo 2, Problema 19b

Identify the numbers in each of the following statements as measured or exact:
b. A patient is given 2 tablets of medication.

Guida verificata passo dopo passo
1
Understand the difference between measured and exact numbers: Measured numbers are obtained through measurement and may have some degree of uncertainty, while exact numbers are defined or counted and have no uncertainty.
Analyze the statement: 'A patient is given 2 tablets of medication.'
Recognize that the number '2' in this context is a counted quantity, as tablets are discrete items that can be counted directly.
Conclude that counted quantities are considered exact numbers because they are not subject to measurement uncertainty.
Determine that the number '2' in this statement is an exact number.

Risposta video verificata per un problema simile:

Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
1m

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Measured Numbers

Measured numbers are values obtained through measurement and can vary based on the precision of the measuring instrument. They are often subject to uncertainty and can include values like weight, height, or temperature. In the context of the question, measured numbers would be those that are not whole or exact, reflecting a range of possible values.
Video consigliato:
Percorso guidato
02:52
Measuring Radioactivity Concept 1

Exact Numbers

Exact numbers are values that are counted or defined and have no uncertainty associated with them. They are whole numbers that represent a fixed quantity, such as the number of items in a set. In the example provided, the statement about a patient receiving 2 tablets is an exact number because it represents a definitive count of tablets.
Video consigliato:
Percorso guidato
03:13
Calculate Oxidation Numbers

Significance of Measurement Types

Understanding the distinction between measured and exact numbers is crucial in fields like medicine and science, as it affects calculations, data interpretation, and decision-making. Measured numbers can introduce variability in results, while exact numbers provide certainty. This distinction helps professionals assess the reliability of data and make informed choices based on the nature of the numbers involved.
Video consigliato:
Percorso guidato
01:49
Significant Figures Precision Concept
Pratica correlata
Domanda del libro di testo

Identify the measured number(s), if any, in each of the following pairs of numbers:

b. 1 table and 4 chairs

1828
views
Domanda del libro di testo

Write each of the following in scientific notation with two significant figures:

d. 0.000 25 cm

2023
views
Domanda del libro di testo

Identify the numbers in each of the following statements as measured or exact:

a. Sandra has a patient with a mass of 67.5 kg.

33
views
Domanda del libro di testo

Identify the measured number(s), if any, in each of the following pairs of numbers:

a. 3 hamburgers and 6 oz of hamburger

1863
views
Domanda del libro di testo

Identify the exact number(s), if any, in each of the following pairs of numbers:

a. 5 pizzas and 50.0 g of cheese

2102
views
Domanda del libro di testo

Write each of the following in scientific notation with two significant figures:

c. 100 000 m

1785
views