Skip to main content
Ch.1 - Introduction: Matter, Energy, and Measurement
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoBrown 14th EditionCh.1 - Introduction: Matter, Energy, and MeasurementProblema 45d
Capitolo 1, Problema 45d

What is the number of significant figures in each of the following measured quantities? (d) 2.94×103 m2

Guida verificata passo dopo passo
1
Identify the digits in the number 2.94\(\times\)10^3.
Determine which digits are significant. In this case, all non-zero digits are significant.
Count the number of significant digits in the base number 2.94.
Recognize that the exponent in scientific notation (10^3) does not affect the number of significant figures.
Conclude that the number of significant figures in 2.94\(\times\)10^3 is the same as in 2.94.

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:
55s

Concetti chiave

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

Significant Figures

Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion. Understanding significant figures is crucial for accurately reporting measurements and ensuring that calculations reflect the precision of the data.
Video consigliato:
Percorso guidato
01:09
Significant Figures Example

Scientific Notation

Scientific notation is a way of expressing numbers that are too large or too small to be conveniently written in decimal form. It is represented as a product of a number between 1 and 10 and a power of ten. For example, 2.94×10³ indicates that the number is 2.94 multiplied by 1,000, which helps in identifying significant figures more easily.
Video consigliato:
Percorso guidato
02:50
Standard Notation to Scientific Notation

Rules for Counting Significant Figures

There are specific rules for counting significant figures in a number. For example, in scientific notation, all digits in the coefficient (the number before the exponent) are significant. Therefore, in 2.94×10³, the digits 2, 9, and 4 are all significant, leading to a total of three significant figures in this measurement.
Video consigliato:
Percorso guidato
04:40
Significant Figures Rules
Pratica correlata
Domanda del libro di testo

What is the number of significant figures in each of the following measured quantities? (b) 3ⅹ10-6 m

391
views
Domanda del libro di testo

Indicate which of the following are exact numbers: (a) the mass of a 3- by 5-in. index card, (b) the number of ounces in a pound, (c) the volume of a cup of Seattle's Best coffee, (d) the number of inches in a mile, (e) the number of microseconds in a week, (f) the number of pages in this book.

958
views
Domanda del libro di testo

Indicate the number of significant figures in each of the following measured quantities: (e) 89.2 metr ic tons

474
views
Domanda del libro di testo
Indicate which of the following are exact numbers: (a) the mass of a 32-oz can of coffee, (b) the number of students in your chemistry class, (c) the temperature of the surface of the Sun, (d) the mass of a postage stamp, (e) the number of milliliters in a cubic meter of water, (f) the average height of NBA basketball players.
599
views
Domanda del libro di testo

What is the number of significant figures in each of the following measured quantities? (e) 92.03 km

386
views
Domanda del libro di testo

Round each of the following numbers to four significant figures and express the result in standard exponential notation: (a) 102.53070

569
views