Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Chem Final Unit 1

This will list past important notes from this unit 1 chem work

QuestionAnswer
How do you calculate formula mass? What do they measure in? add up atomic masses amu
What are atomic masses equal to? molar mass (g/mol)
Find the formula mass of NH4NO3. 80.05 amu
Find the molar mass of NH4NO3. 80.05 g/mol
Convert 10g NH4NO3 to moles. 0.1254 mol NH4NO3
What does molecular mass or molecular weight refer to? formula mass of a molecular compound
What is the formula for Mass Percent Composition? divide the mass of element in 1 mole of the compound by the compound's molar mass and multiply the result by 100
What is the percent composition of CO2? C = 27.29% O = 72.21%
What is the formula mass of CHCl3? 60.05 amu
Percent composition of C5H12 83.22% C 16.78% H
What is Avogardo's Number? 1 mole = 6.02*10^23
What is Avogadro's Number associated with and what is it used for? associated with a very small particle or atom or a formula unit represented with a compound used for a conversion problem
Convert 5 mole CH4 to molecules. 3.0*10^24 molecules
Convert 3*10^24 atoms H to mol H. 5 mol H
Convert 12g He to atoms. 1.8*10^24 atoms He
What is the same as the number of products? reactants reactants --> products
Balance BaCl2 + NaOH --> Ba(OH2) + NaCl BaCl2 + 2NaOH --> Ba(OH)2 + 2NaCl
What is important to know about polyatomic atoms? If polyatomic atoms are the same on both sides DO NOT separate them
Balance C2H4 + O2 --> CO2 + H2O C2H4 + 3O2 --> 2CO2 + 2H2O
What are the equations for stoichiometry? Mol A --> Mol B (mole to mole) Mol A/B --> gB; gA --> mol B (mole ratio) gA --> gB (grams to grams)
Sulfur Dioxide reacts with oxygen gas to form sulfur trioxide. a. If 3.4 moles of sulfur dioxide reacts with excess oxygen gas, how many moles of sulfur trioxide will form? b. How many moles of oxygen gas will react completely with 4.7 moles of sulfure a. 3.4 mol SO3 b. 2.34 mol O2
Propane (C3H8) reacts with oxygen gas to form CO2 and H2O. If 38g of water are produced in the reaction, how many moles of CO2 were produced? 1.58 mol CO2
What is a synthesis reaction? A compound is made from simpler materials A + B --> AB C(s) + O2(g) --> CO2(g) not always balanced equations
What is a decomposition reaction? A compound is broken down into simpler compounds, or all the way down to the elements that made it up. H2O(l) --> H2(g) + O2(g) don't have to break things down all the way down into their basic element
What is a combustion reaction? A compound containing carbon and hydrogen (and sometimes oxygen) combines with oxygen gas to produce carbon dioxide and water. CH4(g) + O2(g) --> CO2(g) + H2O(g) CxHy(O2) + O2 --> CO2 + H2O
What is a single replacement reaction? One element that starts out by itself, replaces another element in a compound, kicking it out. Fe(s) + CuCl2(aq) --> Cu(s) + FeCl2(aq) A + BC --> B + AC
What is a double replacement reaction? The positive and negative ions in 2 compounds switch places. BaCl2(aq) + NaSo4(aq) --> BaSO4(s) + NaCl(aq) AB + CD --> AD + BC
What is the % composition by mass of water in calcium sulfate dihydrate, CaSO4 * 2H2O(s)? 20.93 H2O
A hydrated salt of calcium chloride was found to have a mass of 5.4668g. After heating the substance for a long time, the mass of the anhydrous salt was measured to be 2.7745g. What was the empirical formula of the hydrated calcium chloride compound? CaCl2*6H2O
What is there no equal measure of? reactants limiting reagent and excess reagent
2NH3 + CO2 --> CH4N2O + H2O excess = NH3 -- 0.294 mol CH4N2O limiting = CO2 -- 0.227 mol CH4N2O
What is the equation for percent yeild? (actual yield/theoretical yield)*100
If 15.0g of CH3OH reacts with 10.0g CO, which is the limiting reagent and what is the theoretical yield of CH3COOH? The actual yield is 19.1g. LR = CO -- 0.357mol CH3COOH Theoretical yield = 21.4 CH3OOH
Created by: pandabear66*
Popular Chemistry sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards