Lesson_2.1_Homework_and_Solutions

Lesson_2.1_Homework_and_Solutions - Lesson 2.1 Homework...

Info iconThis 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 .
Background image of page 1

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

View Full DocumentRight Arrow Icon
1 2 2 1 2
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

Lesson_2.1_Homework_and_Solutions - Lesson 2.1 Homework...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online