Exam 3 How Big is a Mole.pdf - What is a mole A mole is a constant number much like a dozen is a constant number The numerical equivalent to a dozen is

Exam 3 How Big is a Mole.pdf - What is a mole A mole is a...

This preview shows page 1 - 2 out of 2 pages.

What is a mole ? A mole is a constant number, much like a dozen is a constant number. The numerical equivalent to a dozen is 12, while the numerical equivalent to a mole is 6.02 x 10 23 . Therefore, one mole of any kind of objects is 6.02 x 10 23 of those objects. 1 mole = 6.02 x 10 23 The mole (mol) is the SI unit for the amount of a substance. The quantity for the mole was experimentally determined and is called Avogadro’s number , in honor of Amendeo Avogadro. In chemistry, we most often count atoms, molecules, and ions. Because these particles are so tiny and impossible to see and there are so many of them, using moles is an easy way to measure quantities of these things. It turns out that if you have 1 mole of atoms, then they will have a measurable mass, in grams, that is equal to the average atomic mass of single atoms. For instance, 1 mole of carbon atoms (6.02 x 10 23 atoms) will have a mass of 12.011g. So, we can convert something that is measurable in the lab, like mass, to something that we can't measure in the lab, like the number of atoms.
Image of page 1

Subscribe to view the full document.

Image of page 2
  • Spring '08
  • unknown
  • Atom, Mole, International System of Units, Molecule, Avogadro constant

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

Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes