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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脳1023鈥尘辞濒别肠耻濒别蝉
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脳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脳1023)(2)(1.60脳10鈭�19C)=1.90脳105C=0.19MC

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

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Most popular questions from this chapter

Question: In Fig. 21-40, four particles are fixed along anxaxis, separated bydistances -2.00. The charges areq1=+2e,q2=-e,q3=+e,andq4=+4e, withe=1.60脳10-19C. In unit-vector notation, what is the net electrostatic force on (a) particle 1 and (b) particle 2 due to the other particles?

In a spherical metal shell of radius R, an electron is shot from the center directly toward a tiny hole in the shell, through which it escapes. The shell is negatively charged with a surface charge density (charge per unit area) of.6.90脳10鈭�13鈥塁/尘2What is the magnitude of the electron鈥檚 acceleration when it reaches radial distances (a)r=0.500Rand (b)2.00R?

Question: In Fig. 21-41, three identical conducting spheres form an equilateral triangle of side length d=20.0 cm. The sphere radii are much smaller thand, and the sphere charges are, qA=-2.00nC,qB=-4.00nC,andqc=+8.00nC.

(a) What is the magnitude of the electrostatic force between spheresAandC?

The following steps are then taken:AandBare connected by a thin wire andthen disconnected;Bis grounded by the wire, and the wire is then removed;BandCare connected by the wire and then disconnected. What now are the magnitudes of the electrostatic force (b) between spheresAandCand (c) between spheresBandC?

Question: (a) Explain what happens to the balls of Problem 42 if one of them is discharged (loses its charge qto, say, the ground). (b) Find the new equilibrium separation x, using the given values of Land mand the computed value of |q|.

The charges of an electron and a positron are -eand+e. The mass of each is9.11脳10鈭�31鈥塳驳.What is the ratio of the electrical force to the gravitational force between an electron and a positron?
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