Lesson_2.1_Homework_and_Solutions

Lesson_2.1_Homework_and_Solutions - Lesson 2.1 Homework...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Lesson 2.1 Homework Solutions 1. One mole of hydrogen gas contains 6.02 × 10 23 molecules. Each hydrogen molecule is composed of two hydrogen atoms and contains two protons. The total number of protons in one mole of hydrogen is 12.04 × 10 23 . Molar mass of hydrogen is 2.01588 × 10 -3 kg.mol -1 . The number of moles of hydrogen in one kg is: 3 mass 1 kg 496 moles molar mass 2.01588 10 n - = = = × Number of protons in 1 kg = 496 × 12.04 x 10 23 = 5.97 × 10 26 . Total charge = 5.97 × 10 26 × 1.602 × 10 -19 = 9.56 × 10 7 C 2. The charge carried by one proton = 1.602 × 10 -19 C. The number of protons in 1 C of charge = 19 18 1. 6.24 10 0 1.602 10 C C - × = × 3. 1 2 2 2 1 2 2 4.2 10 ...( ) q q q F k q k r r i - = × = Let F be the force when the distance between the two charges is (1/8)r 1 2 2 2 2 1 2 64 64 4.2 1 2. 0 1 8 69 kq q q q F k r r N - = = = × × = 4. 1 2 2 0.15 q q F k = When they are moved away, the force = (1/3)F. Let r be the new distance between q 1 and q 2 .
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
1 2 2 1 2 2 2 2 1 2 2 2 2 2 1 3 0.15 1 0.15 3 3 0.15 3 0. 26 15 0.15 3 q q F k r kq q F r kq q F r r r m cm = = = = = × = = 5.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern