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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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Most popular questions from this chapter

The charges of an electron and a positron are -eand+e. The mass of each is9.11×10−31 kg.What is the ratio of the electrical force to the gravitational force between an electron and a positron?

Question: (a) what equal positive charges would have to be placed on Earth and on the Moon to neutralize their gravitational attraction? (b) Why don’t you need to know the lunar distance to solve this problem? (c) How many kilograms of hydrogen ions (that is, protons) would be needed to provide the positive charge calculated in (a)?

In Fig. 21-26, particle 1 of charge q1=−80.0μCand particle 2 of charge q2=+40.0μCare held at separation L=20.0 cmon an xaxis. In unit-vector notation, what is the net electrostatic force on particle 3, of charge q3=20.0 μC, if particle 3 is placed at (a)x=40.0cm and (b) x=80.0 cm? What should be the (c) xand (d) ycoordinates of particle 3 if the net electrostatic force on it due to particles1 and 2 is zero?

In Fig. 21-28a, particles 1 and 2 have charge 20.0μCeach and are held at separation distance d=1.50m. (a) What is the magnitude of the electrostatic force on particle 1 due to particle 2? In Fig. 21-28b, particle 3 of charge 20.0μCis positioned so as to complete an equilateral triangle. (b) What is the magnitude of the net electrostatic force on particle 1 due to particles 2 and 3?

In Fig. 21-26, particle 1 of charge-5.00qand particle 2 of charge +2.00q are held at separation Lon anx-axis. If particle 3 of unknown charge q3is to be located such that the net electrostatic force on it from particles 1 and 2 is zero, what must be the (a) x and (b) y coordinates of particle 3?
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