Question

Calculate the mass in grams for a single molecule of the following compounds: (a) methane, $\mathrm{CH}_{4}$ (b) ammonia, $\mathrm{NH}_{3}$ (c) sulfur trioxide, $\mathrm{SO}_{3}$ (d) nitrogen dioxide, $\mathrm{NO}_{2}$

Name: Problem 22, Chapter 9: Introductory Chemistry: Concepts and Critical Thinking
Uploaded: 2021-06-16T19:01:38-08:00
Duration: 2 min 2 s
Channel: David Collins
Description: Calculate the mass in grams for a single molecule of the following compounds: (a) methane, CH4 (b) ammonia, NH3 (c) sulfur trioxide, SO3 (d) nitrogen dioxide, NO2

   Calculate the mass in grams for a single molecule of the following compounds:
(a) methane, $\mathrm{CH}_{4}$
(b) ammonia, $\mathrm{NH}_{3}$
(c) sulfur trioxide, $\mathrm{SO}_{3}$
(d) nitrogen dioxide, $\mathrm{NO}_{2}$

Introductory Chemistry: Concepts and Critical Thinking

Charles H. Corwin 7th Edition

Chapter 9, Problem 22

Instant Answer

Solved by Expert David Collins

06/16/2021

Step 1

We can do this by adding up the atomic masses of each atom in the molecule. The atomic masses can be found on the periodic table. (a) For methane, $\mathrm{CH}_{4}$, the atomic mass of carbon (C) is approximately 12.01 AMU and the atomic mass of hydrogen (H) is Show more…

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Calculate the mass in grams for a single molecule of the following compounds: (a) methane, $\mathrm{CH}_{4}$ (b) ammonia, $\mathrm{NH}_{3}$ (c) sulfur trioxide, $\mathrm{SO}_{3}$ (d) nitrogen dioxide, $\mathrm{NO}_{2}$

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Key Concepts

Molar Mass

Molar mass is the sum of the standard atomic weights of all the atoms in a molecule and is expressed in grams per mole (g/mol). It provides a link between the mass of a substance and the amount of substance, allowing you to convert between the mass of a compound and the number of moles it contains.

Avogadro's Number

Avogadro's Number is a fundamental constant that defines the number of constituent particles (usually atoms or molecules) in one mole of a substance, approximately 6.022 x 10^23 particles/mol. This constant is crucial for converting between the molar mass of a compound and the mass of a single molecule.

Mole Concept

The mole concept is a fundamental principle in chemistry that relates the mass of a substance to the number of its elementary entities (like atoms or molecules). It underpins the conversion between the macroscopic measurements of mass and the microscopic count of molecules, using the molar mass and Avogadro’s number.

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