Skip to main content
Ch.1 - Chemical Tools: Experimentation & Measurement
McMurry - Chemistry 8th Edition
McMurry8th EditionChemistryISBN: 9781292336145Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoMcMurry 8th EditionCh.1 - Chemical Tools: Experimentation & MeasurementProblema 90c
Capitolo 1, Problema 90c

Round off the following quantities to the number of significant figures indicated in parentheses. (c) 4.995⨉103 cm (3)

Guida verificata passo dopo passo
1
Identify the number of significant figures required, which is 3 in this case.
Look at the given number: \(4.995 \times 10^3\) cm.
Focus on the digits in the coefficient (4.995) since the power of ten does not affect significant figures.
Round the coefficient 4.995 to 3 significant figures. To do this, look at the fourth digit (5) to decide whether to round up or down.
Since the fourth digit is 5, round the third digit up, resulting in the rounded 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:
2m

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 calculations in scientific contexts.
Video consigliato:
Percorso guidato
01:09
Significant Figures Example

Rounding Rules

Rounding rules dictate how to adjust numbers to the desired level of precision. When rounding, if the digit to the right of the last significant figure is less than 5, the last significant figure remains unchanged. If it is 5 or greater, the last significant figure is increased by one. These rules ensure that the rounded number reflects the appropriate level of accuracy.
Video consigliato:
Percorso guidato
00:28
Solubility Rules

Scientific Notation

Scientific notation is a way of expressing numbers that are too large or too small in a compact form, using powers of ten. A number is written as a product of a coefficient (between 1 and 10) and a power of ten. This notation simplifies calculations and helps maintain significant figures, especially in measurements like 4.995⨉10^3 cm.
Video consigliato:
Percorso guidato
02:50
Standard Notation to Scientific Notation
Pratica correlata
Domanda del libro di testo

Round off the following quantities to the number of signifi-cant figures indicated in parentheses. (a) 7.0001 kg (4)

339
views
Domanda del libro di testo

Round off the following quantities to the number of significant figures indicated in parentheses. (a) 35,670.06 m (4, 6)

449
views
Domanda del libro di testo

The diameter of the Earth at the equator is 7926.381 mi. (b) Express the answers in scientific notation.

664
views
Domanda del libro di testo

Round off the following quantities to the number of signifi-cant figures indicated in parentheses. (b) 68.507 g (2, 3)

350
views
Domanda del libro di testo

Round off the following quantities to the number of significant figures indicated in parentheses. (d) 2.309 85⨉10-4 kg (5)

359
views
Domanda del libro di testo

Round off the following quantities to the number of signifi-cant figures indicated in parentheses. (b) 1.605 km

343
views