Skip to main content
Ch.2 - Atoms & Elements
Tro - Chemistry: A Molecular Approach 5th Edition
Tro5th EditionChemistry: A Molecular ApproachISBN: 9780134874371Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoTro 5th EditionCh.2 - Atoms & ElementsProblema 89c
Capitolo 2, Problema 89c

Calculate the mass, in grams, of each sample. c. 1.8×1023 lead atoms

Guida verificata passo dopo passo
1
Identify the given quantity: 1.8 \(\times\) 10^{23} lead atoms.
Recall Avogadro's number, which is 6.022 \(\times\) 10^{23} atoms/mol. This number represents the number of atoms in one mole of a substance.
Calculate the number of moles of lead by dividing the given number of atoms by Avogadro's number: \(\text{moles of lead}\) = \(\frac{1.8 \times 10^{23}\)}{6.022 \(\times\) 10^{23}}.
Find the molar mass of lead (Pb) from the periodic table, which is approximately 207.2 g/mol.
Calculate the mass of the lead sample by multiplying the number of moles by the molar mass: \(\text{mass of lead}\) = \(\text{moles of lead}\) \(\times\) 207.2 \(\text{ g/mol}\).

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.

Avogadro's Number

Avogadro's number, approximately 6.022 x 10^23, is the number of atoms, molecules, or particles in one mole of a substance. This constant allows chemists to convert between the number of particles and the amount of substance in moles, which is essential for stoichiometric calculations.
Video consigliato:
Percorso guidato
02:11
Avogadro's Law

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). For lead (Pb), the molar mass is approximately 207.2 g/mol. Knowing the molar mass is crucial for converting moles to grams when calculating the mass of a given number of atoms.
Video consigliato:
Percorso guidato
02:11
Molar Mass Concept

Mass Calculation from Atoms

To calculate the mass of a sample from the number of atoms, one first converts the number of atoms to moles using Avogadro's number. Then, the number of moles is multiplied by the molar mass of the element to find the mass in grams. This process is fundamental in quantitative chemistry.
Video consigliato:
Percorso guidato
02:00
Calculating Atomic Mass
Pratica correlata
Domanda del libro di testo

Calculate the number of atoms in each sample. a. 5.18 g P

1143
views
Domanda del libro di testo

Calculate the number of atoms in each sample. a. 14.955 g Cr

1699
views
1
rank
Domanda del libro di testo

Calculate the mass, in grams, of each sample. a. 1.1×1023 gold atoms b. 2.82×1022 helium atoms

1317
views
Domanda del libro di testo

Calculate the mass, in grams, of each sample. d. 7.9×1021 uranium atoms

1340
views
Domanda del libro di testo

Calculate the mass, in kg, of each sample. a. 7.55×1026 cadmium atoms b. 8.15×1027 nickel atoms c. 1.22×1027 manganese atoms d. 5.48×1029 lithium atoms

1184
views
1
comments
Domanda del libro di testo

How many carbon atoms are there in a diamond (pure carbon) with a mass of 52 mg?

3080
views
2
rank