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Chapter 21: Q45P (page 628)

How many megacoulombs of positive charge are in 1.00molof neutral molecular-hydrogen gas (H2)?

Short Answer

Expert verified

The value of the positive charge in the hydrogen molecule is0.19MC.

Step by step solution

01

The given data

  1. Neutral molecular-hydrogen gas (H2) of 1.00molis given.
  2. Avogadro number in one mole of a substance,NA=6.023×1023 molecules
02

Understanding the concept of Coulomb’s law

Using the concept of quantization of charges, we can get the net charge in the given mol of hydrogen gas.

Formula:

The total charge of a molecule respective to the Avogadro number,

Q=NAq,where,q=no.ofelectrons×electroniccharge (i)

03

Calculation of the total positive charge in mega coulombs 

There are two protons (each with charge q = +e) in each molecule.

So, using the formula of equation (i), we can get the positive charge value in mega coulombs as given:

Q=(6.023×1023)(2)(1.60×10−19C)=1.90×105C=0.19MC

Hence, the value of the positive charge is0.19MC

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