Skip to main content
Ch.3 - Molecules and Compounds
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.3 - Molecules and CompoundsProblema 95
Capitolo 3, Problema 95

From the given empirical formula and molar mass, find the molecular formula of each compound. a. C6H7N, 186.24 g/mol

Guida verificata passo dopo passo
1
Identify the empirical formula: C_6H_7N.
Calculate the molar mass of the empirical formula. Use the atomic masses: C = 12.01 g/mol, H = 1.01 g/mol, N = 14.01 g/mol.
Calculate the total molar mass of the empirical formula: (6 * 12.01) + (7 * 1.01) + (1 * 14.01).
Divide the given molar mass of the compound (186.24 g/mol) by the molar mass of the empirical formula to find the ratio (n).
Multiply the subscripts in the empirical formula by the ratio (n) to find the molecular formula.

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.

Empirical Formula

The empirical formula represents the simplest whole-number ratio of atoms of each element in a compound. It provides essential information about the composition of the compound but does not indicate the actual number of atoms present in a molecule. For example, the empirical formula for glucose (C6H12O6) is CH2O, reflecting the ratio of carbon, hydrogen, and oxygen.
Video consigliato:
Percorso guidato
02:26
Empirical vs Molecular Formula

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in the molecular formula. Knowing the molar mass is crucial for converting between grams and moles, and it helps in determining the molecular formula from the empirical formula when combined with the empirical formula's mass.
Video consigliato:
Percorso guidato
02:11
Molar Mass Concept

Molecular Formula

The molecular formula indicates the actual number of atoms of each element in a molecule of a compound. It can be derived from the empirical formula by multiplying the subscripts by a whole number, which is determined by the ratio of the compound's molar mass to the empirical formula mass. For instance, if the empirical formula is CH2 and the molar mass is 86 g/mol, the molecular formula would be C6H12.
Video consigliato:
Percorso guidato
02:08
Determining Molecular Formulas
Pratica correlata
Domanda del libro di testo

From the given molar mass and empirical formula of several compounds, find the molecular formula of each compound. a. C4H9, 114.22 g/mol

1404
views
Domanda del libro di testo

The elemental mass percent composition of ascorbic acid (vitamin C) is 40.92% C, 4.58% H, and 54.50% O. Determine the empirical formula of ascorbic acid.

2425
views
Domanda del libro di testo

A 45.2-mg sample of phosphorus reacts with selenium to form 131.6 mg of the selenide. Determine the empirical formula of phosphorus selenide.

1951
views
1
comments
Domanda del libro di testo

From the given molar mass and empirical formula of several compounds, find the molecular formula of each compound. b. CCl, 284.77 g/mol

1931
views
2
rank
1
comments
Domanda del libro di testo

From the given molar mass and empirical formula of several compounds, find the molecular formula of each compound. c. C3H2N, 312.29 g/mol

1276
views