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Chapter 3: Q22P (page 131)

Oxygen is required for the metabolic combustion of foods. Calculate the number of atoms in 38.0 g of oxygen gas, the amount absorbed from the lungs at rest in about 15 min.

Short Answer

Expert verified

The number of atoms is1.43×1024Oatoms

Step by step solution

01

Definition of number of atoms

The number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus is defined as number of atoms.

02

Calculations of number of atoms in 38.0 g of oxygen gas

Number of atoms is calculated as:

=38.0gO2(molO232.00gO2)(2molOatoms1molO2)(6.022×1023atomsmolO2)

Therefore, the number of atoms=1.43×1024Oatoms

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Most popular questions from this chapter

Solar winds composed of free protons, electrons, andparticles bombard Earth constantly, knocking gas molecules outof the atmosphere. In this way, Earth loses about 3.0 kg of matterper second. It is estimated that the atmosphere will be gone inabout 50 billion years. Use this estimate to calculatethe amount (mol) of nitrogen,which makes up 75.5 mass % of the atmosphere.

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