Exam (elaborations)
UC Davis - Chem 2A - Midterm 1 Questions And Answers Latest Update 2024/2025
- Course
- Institution
UC Davis - Chem 2A - Midterm 1 Questions And Answers Latest Update 2024/2025
[Show more]
Content preview
UC Davis - Chem 2A - Midterm 1 QuestionsAnd Answers Latest Update 2024/2025
Law of Conservation of Mass Answer: Total mass of reactants = Total mass of products
Law of Constant Composition Answer: A given compound always contains elements in exactly the
same proportion by mass
Law of Multiple Proportions Answer: If two or more different compounds are composed of the
same two elements, then the ratio of the masses of the second element combined with a certain mass
of the first element is always a ratio of small whole numbers
Dalton's Atomic Theory Answer: 1) elements are composed of indestructible atoms atoms.
2) atoms of same element are identical, but differ from other elements.
3) elements can mix together only in whole number ratios.
Mole Answer: The amount of a substance that contains the same number of elemental entities as
exactly 12g of C-12.
I.e. Amount needed for every amu to equal 1g.
Find the number of atoms in a substance by taking the mass of each element, dividing it by the molar
mass, then multiplying by Avogadro's number and adding the atoms of each element back up.
Molecular Compound Answer: Formed from two or more covalently bonded nonmetals that share
electrons.
Chemical Formula Answer: Formula of a composition that shows basic connectivity.
, eg. C3H7CO2H
Molecular Formula Answer: Formula giving the number of atoms of each element while not
showing connectivity.
Empirical Formula Answer: Simplest formula where subscripts are divided by the greatest common
multiple.
Structural Formula Answer: Drawing that shows connectivity between all atoms.
Condensed Structural Formula Answer: A structural formula that doesn't show bond connectivity.
eg. CH3CH2CH2CO2H
Bond Line Structure Answer: If you're really lazy and you don't want to write carbon into your
organic structure. Carbon is at all the vertices and there is an undrawn hydrogen if it is missing a bond.
Ionic Compounds Answer: Metals and nonmetals join by electrostatic interactions. Electrons are
stolen.
Cations have a + charge. Anions have a - charge.
micro Answer: M 10^-6
nano Answer: n 10^-9
pico Answer: p 10^-12
femto Answer: f 10^-15
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 Schoolflix. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $15.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75323 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now