638 Answered Questions for the topic AP chemistry

Ap Chemistry Stoichiometry

11/04/15

Stoichiometry
42g of aluminum perchlorate are reacted with 75g of sodium thiocyanate. 1)What is the mass of the precipitate? 2)What are the espectator ions, and how many individual ions are there?  
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09/22/15

Ionic Size
I really don't understand what this is asking... please help.   1.) As you move left to right across the period, there are two elements that instead show a decrease in ionization energy. Identify... more
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Ap Chemistry

08/30/15

The density of air at ordinary atmospheric pressure and 25 c is 1.19g/l. What is the mass in kg of the air in a room that measures 12.5 by 15.5 by 8.0 feet?
please help me solve this problem.
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12/21/14

Percent Composition Problems
I need a brief example on how to solve Percent Composition probs please. Oh and btw how I can I tell when a compound is ionic or covalent ?  
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Ap Chemistry

03/31/14

ap chem acid and base
Using data from this table of dissociation constants for acids, calculate [OH- ] and pH for each of the following solutions. (Kw = 1.0 10-14.)   A mixture that is 0.050 M in CH3COONa and 0.044 M... more
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Ap Chemistry

02/26/14

What is the pH of a buffer when 12 g of NaH2PO4 and 8.00 g of Na2HPO4 are diluted with water to a volume of 0.50 L? (Ka=6.2 x 10^-8)
AP Chemistry question
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Ap Chemistry

01/12/14

diffusion of gasses
I have a problem that I am working on, but I don't know the reason why the answer is what it is. Explanation please?   The experimental apparatus represented above is used to demonstrate the... more
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Ap Chemistry Chemistry Gas Laws

01/01/14

AP chem gases
Gas (A) Methane, (B) Ethane, (C) Propane, (D) Butane
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Ap Chemistry Chemistry Gas Laws

01/01/14

AP chem gases
    D. HBr and NH3
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Ap Chemistry

12/09/13

how do you calculate lattice energy of an ionic compound
The question is "The lattice energies of FeCl3, FeCl2, and Fe2O3 are -2631,-5359, and -14,774 kJ/mol (in no particular order). Match the appropriate formula to the energy and explain. My question... more
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Ap Chemistry

11/16/13

how do you find the bonding orbitals in central atom?
We are doing molecular geometry and I don't understand how to figure it out
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Ap Chemistry Chemistry Lab

10/02/13

Chemistry lab question spectroscopy percent brass in copper
my lab: Percent Copper in Brass by using spectroscopyI have Copper(II) nitrate solution Copper(II) sulfate solution Iron(III) nitrate solution Iron(III) chloride solution Zinc nitrate... more
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Ap Chemistry Chemistry Lab

10/02/13

Chemistry lab question:
my lab: Percent Copper in Brass by using spectroscopy I have Copper(II) nitrate solution            Copper(II) sulfate solution           Iron(III) nitrate solution           Iron(III) chloride... more
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