Chesmistry notes from the whole grade 10 year. These notes include the different types of gas laws, which are boyle's law, charles' law, gay-lussac's law, combined gas law, i deal gas law and avogadro's law, stoichiometry, mole ration, chemical reactions and many more.
STOICHIOMETRY DEFINED
● - branch of chemistry and chemical engineering that deals with the quantities of
substances that enter into, and are produced by, chemical reactions
● - provides the quantitative relationship between reactants and products in a chemical
reaction.
– For example, when methane unites with oxygen in complete combustion, 16g of methane
requires 64g of oxygen. At the same time 44g of carbon dioxide and 36g of water are formed as
reaction productions.
● method of obtaining proportions from chemical formulas, equations, atomic weights and
molecular weights, and determination of what and how much is used and produced in
chemical processes
Formula Mass and Molecular Mass
Formula Mass
● The sum of the average atomic masses (atomic weight in the periodic table) of all the
atoms represented in the ionic compound’s chemical formula.
Molecular Mass
● The sum of the average atomic masses (atomic weight in the periodic table) of all the
atoms represented in the covalent/molecular compound’s chemical formula.
Formula Mass of NaCl
Formula Mass = 58.440 g
,Molecular Mass of C9H8O4
Molecular Mass = 180.150 g
Try these.
● Determine the formula mass or the molecular mass of the following compounds:
1.caffeine, C8H10N4O2
2.hydrogen peroxide, H2O2
3.glucose, C6H12O6
4.lead oxide PbO2
5.magnesium carbonite, MgCO2
Molar Mass
A Mole of something…
Molar Mass
, ● The mass in grams of 1 mol of that substance
Try these.
● Determine the mass of the following compounds:
a. 1 mole of caffeine, C8H10N4O2
b. 2.5 moles hydrogen peroxide, H2O2
c. 1.5 moles of glucose, C6H12O6
d. 3 moles of lead oxide PbO2
e. 2 moles of magnesium carbonite, MgCO2
Stoichiometry
In Chemistry,
Mole- atomic counting unit
● Latin word that means “heap” or “a huge pile”
● Amount of substance that contains as many particles as there are atoms in 12 grams of
Carbon-12 “mol” as the SI symbol
● Equivalent to Avogadro’s number, 6.022 x 1023
1 mol = 6.022 x 1023 particles
Converting Moles to Mass
What is the mass of 5.00 mol of C?
5 mol x 12.011g C/1 mol C = 60.055g C
Converting Mass to Moles
How many moles are present in 25.6 g of C?
25.6g C x 1 mol C/12.011g C = 2.131 mol C
Converting Number of Particles to Mass
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 Anonymous255. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
