Skip to main content
Ch.2 - Atoms & Elements
Tro - Chemistry: A Molecular Approach 6th Edition
Tro6th EditionChemistry: A Molecular ApproachISBN: 9780137832217Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoTro 6th EditionCh.2 - Atoms & ElementsProblema 102
Capitolo 2, Problema 102

How many helium atoms are there in a helium blimp containing 587 kg of helium?

Guida verificata passo dopo passo
1
Convert the mass of helium from kilograms to grams by multiplying by 1000, since there are 1000 grams in a kilogram.
Determine the number of moles of helium by dividing the mass of helium in grams by the molar mass of helium (4.00 g/mol).
Use Avogadro's number (6.022 x 10^23 atoms/mol) to calculate the number of helium atoms by multiplying the number of moles of helium by Avogadro's number.
Ensure all units are consistent and cancel appropriately during calculations to maintain dimensional accuracy.
Review the steps to ensure each conversion and calculation aligns with the principles of stoichiometry and dimensional analysis.

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.

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). For helium, the molar mass is approximately 4.00 g/mol. This concept is essential for converting between the mass of helium and the number of moles, which is necessary to determine the number of atoms.
Video consigliato:
Percorso guidato
02:11
Molar Mass Concept

Avogadro's Number

Avogadro's number, approximately 6.022 x 10²³, is the number of atoms, ions, or molecules in one mole of a substance. This constant allows us to relate the amount of substance in moles to the actual number of particles, making it crucial for calculating the total number of helium atoms in the blimp.
Video consigliato:
Percorso guidato
02:11
Avogadro's Law

Conversion from Mass to Moles

To find the number of atoms in a given mass of a substance, one must first convert the mass to moles using the formula: moles = mass (g) / molar mass (g/mol). This step is vital in the problem, as it establishes the foundation for using Avogadro's number to find the total number of atoms present in the helium blimp.
Video consigliato:
Percorso guidato
02:28
Mass and Moles Conversion
Pratica correlata
Domanda del libro di testo

Using scanning tunneling microscopy, scientists at IBM wrote the initials of their company with 35 individual xenon atoms (as shown below). Calculate the total mass of these letters in grams.

413
views
Domanda del libro di testo

A 7.83 g sample of HCN contains 0.290 g of H and 4.06 g of N. Find the mass of carbon in a sample of HCN with a mass of 3.37 g.

1424
views
1
rank
Domanda del libro di testo

Calculate the average mass, in grams, of one platinum atom.

1331
views
Domanda del libro di testo

How many carbon atoms are there in a diamond (pure carbon) with a mass of 83 mg?

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