Class notes
Chem 1405 Mole and Chemical Formulas Notes
- Course
- CHEM 1405
- Institution
- Lone Star College
This is a comprehensive and detailed note MOLE and Chemical Formulas for Chem 1405. ***Essential Study Resource!!
[Show more]
Content preview
MOLE and CHEMICAL FORMULASStoichiometry
How many grams of acid are needed to prepare 300 mL of a solution 2.0M ?
How much iron can be obtained from a 50 pounds of iron ore?
How many moles of oxygen are consumed during the combustion of ethane?
◦ STOICHIOMETRY : the study of the mass relations in chemistry.
◦ Mol – Grams
◦ Grams - mol
◦ Grams of reactants – grams of product
◦ Mol product – mol of reactant
The Mole –Chemist’s Dozen
Large items are count by units
◦ 1 dozen of eggs = 12 eggs
◦ 1 lb of rice = 16 oz of rice
How do you count particles that you don’t see?
A mole is Avogadro’s number of items
Chemists use the MOLE unit.
◦ Mole is a very large number
◦ Avogadro’s number: 6.022 x 1023
1 one mole of anything = 6.022 X 1023 of that same anything
1 mole of sand grains = 6.022 x 1023 sand grains
1 mole of marbles = 6.022 x 1023
1 mole of He atoms = 6.022 x 1023 He atoms
Example:
Calcium is the most abundant metal in the human body. A typical human body contains roughly 30
moles of calcium.
Determine
(a) the number of Ca atoms in 30.00 moles of calcium
(b) the number of moles of calcium in a sample containing 1.00 × 1020 Ca atoms.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller anyiamgeorge19. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.39. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
53340 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now