10/04/16

How much of an alloy that is 30% copper should be mixed with 300 ounces of an alloy that is 70% copper in order to get an alloy that is 50% ?copper?
How much of an alloy that is 30% copper should be mixed with 300 ounces of an alloy that is 70% copper in order to get an alloy that is 50% ?copper?
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10/01/16

Aqueous solubility of CO2 is 24.8 ml of CO2 per liter at 273K and a CO2 partial pressure of 3.6 atm... find molarity
Aqueous solubility of CO2 is 24.8 ml of CO2 per liter at 273K and a CO2 partial pressure of 3.6 atm. What is the molarity of a saturated water solution when the CO2 is under its normal... more
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09/28/16

A graph of temperature (°C) versus solubility of benzoic acid in water (g/L) has a good exponential fit, y = 1.479e0.0357x,
(continued...) indicated by the Goodness of Fit R2 = 0.9955.  Don't forget that there are 1000 ml in a liter.  Round to a whole number answer without any decimal point.   Given that you used 12.4... more
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09/28/16

Calculate the number of grams of each element...
Calculate the number of grams of each element in 100 g of phenolphthalein if the compound is 75.46% C, 4.43% H, and 20.10% O by mass. Convert each to moles.
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09/28/16

Bridge head Carbocations
Why are bridge head carbocations unstable?
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09/25/16

A student carried out the reaction starting with 1.993g of unknown (X2CO3) and found that the mass loss due to CO2 was 0.593g. What is the identity of the metal
A student carried out the reaction starting with 1.993g of unknown (X2CO3) and found that the mass loss due to CO2 was 0.593g. What is the identity of the metal(K,Li, or Na?)
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09/24/16

EAN Rule Doubts
when EAN rule is obeyed?? only when it is 36??
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09/22/16

Why doesn't NaCl and HCl have the same effect on an equilibrium reaction
Recently in my AP Chem class we did a simple reaction demonstrating equilibrium: [Co(H2O)6]2+(aq)(pink) + 4Cl-(aq) <--> [CoCl4]2-(aq)(blue) + 6H2O(l) (in an ethanol solution). The reaction... more
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09/20/16

nodes difference between planar and radial nodes
nodes difference between planar and radial nodes and their calculation ??
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09/20/16

If I dissolve baking soda in boiling water, can the solution still be used as a cleaning agent? Will the solution remain liquid if left at room temperature?
Wondering if baking soda could be made into a gel like substance if i added oils. 
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09/19/16

How many fluid ounces of a 60 percent saline solution must be mixed with a 75 percent saline solution to get 100 fluid ounces of a 72 percent solution?
There are four possible answers: a. 15 fluid ounces. b. 20 fluid ounces. c. 24 fluid ounces. d. 30 fluid ounces   Word problems like these confuse me and I just don't know where to put what.... more
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09/15/16

Write balanced equations for each of the following.
Write balanced equations for each of the following. Remember to use a good approach: think about what kind of chemicals are involved, what type of reaction they may be involved, what the products... more
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09/15/16

why is the temperature constant when a pure substance melts and freezes?
why is the temperature constant when a pure substance melts and freezes?
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09/13/16

Write a balanced chemical equation for each of the following reactions. Check your work by balancing backwards. a. Calcium phosphide reacts with water to form
Write a balanced chemical equation for each of the following reactions. Check your work by balancing backwards.   a. Calcium phosphide reacts with water to form calcium hydroxide and phosphorous... more
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09/11/16

When looking at butanol, ethanol, pentane, and methanol, which two have comparable size of London forces but very different dipole dipole interactions. Explain
Data that might be helpful to you in terms of evaporation methanol - Intial temp= 23.7 C final temp= 18.9 C with a time of 17.55 sec ethanol - Intial temp=24.3 C final temp= 18.8 C time= 19.48... more
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09/09/16

I figured out the reaction table and the mass of Ag2Cro4 but I don't know how to find the molar concentration of the reamining excess reactant?
Complete a reaction table in millimoles for the reaction of 33.4 mL of 0.9500 M Ag1+ and 20.3 mL of 1.0400 M CrO42-. What mass in grams of Ag2CrO4 forms? 5.27 What is the molar concentration of... more
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09/06/16

The compound NaAu is something described as an ionic compound. Au is the symbol
The compound NaAu is something described as an ionic compound. Au is the symbol for gold; the Latin aurum is typically used for gold compounds. We will use it here. Name NaAu as an ionic compound.
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08/01/16

Which solution is likely to contain the complex that has the stronger-field ligand?
Two Fe (II) complexes are both low spin but have different ligands. A solution of one is green and a solution of the other is red.    Which solution is likely to contain the complex that has the... more
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07/14/16

Determine delta H
In a coffee-cup calorimeter, 1 mol NaOH and 1 mol HCl initially at 22 oC (Celsius) are mixed in 100g of water to yield the following reaction:NaOH + HCl → Na+(aq) + Cl-(aq) + H2O(l)After mixing... more
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07/14/16

Bomb Calorimetry
A 2.44 g sample of stearic acid (C18H32O2), a common constituent of fats, is burned in a bomb calorimeter. The temperature of the calorimeter increases by 48.0oC (Celsius). Given that the energy of... more
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06/28/16

major product
What is the major product of the following reaction and what is its mechanism ? (given link is of the reaction)   http://i.imgur.com/c5lnMBt.jpg
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05/27/16

Chemistry lab help
I'm working on a lab and I need someone to explain how to calculate some of the data. If you could give me an example for each one I don't understand I would appreciate it so I can work out the... more
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04/27/16

Writing a balanced chemical reaction
An aqueous solution of be2+ is slightly acidic. Write a balanced chemical reaction that shows why. (Note: Be2+ is surrounded by four water molecules when it is in solution)
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03/21/16

Phosphorus oxychloride has the chemical formula POCl3, with P as the central atom. In order to minimize formal charge, how many bonds does phosphorus make to th
3, 4, 5, 6, or 7?
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02/28/16

complete the equation: soap + sodium oleate + HCl?
Can you please help me complete these equations. soap + sodium oleate + HCl soap + sodium oleate + MgCl2 soap + sodium oleate + Pb(C2H3O2)2
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