12/30/20

What do covalent compounds use in their names that ionic compounds do not?
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12/30/20

How do you determine the chemical formula of an ionic compound from the name of the compound?

(assume only representative elements for your explanation.)
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12/30/20

Solubility equilibrium - Review question help!
The solubility of ZnCO3 in water is quite low. What could you add to increase the solubility? Explain how your method works in detail.
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12/28/20

Balance Redox reaction

How would you balance the following redox reaction using oxidation number method? (Not half reaction method). Also is this an example of a disproportion reaction? Thanks!Cl2 ➡️ ClO3^- + Cl-
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12/28/20

Determine the vapor pressure of a solution at 25°C that contains 100 g of naphthalene (C10H8) in 600 g of benzene (C6H6). The vapor pressure of benzene at 25°C is 74.6 torr
Determine the vapor pressure of a solution at 25°C that contains 100 g of naphthalene (C10H8) in 600 g of benzene (C6H6). The vapor pressure of benzene at 25°C is 74.6 torr
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12/27/20

Redox reaction of iron III oxide and carbon monoxide
Balancing redox reaction by Oxidation number method:Fe2O3 + CO ➡️ Fe(s) + CO2 in this oxidation reduction reaction the iron goes from a +3 charge to zero while the carbon goes from +2 to +4.... more
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12/27/20

PLEASE HELP ASAP

The precipitate of silver fosphate is obtained by mixing 35.0 mL of 0.428 M sodium fosphate (Na3PO4) and 15.0 mL of 0.167 M silver nitrate (AgNO3).a)How many grams of silver fosphate is obtained?b)... more
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12/26/20

HELP PLEASE ASAP
When 0.177 g of a sample containing organic substance is burned with oxygen gas, the carbondioxide realised is held in the solution of barium hydroxide. 0.5613 g of barium carbonate is formed.... more
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12/26/20

Explain the significance of the sign of the enthalpy value (+ or -). Provide a specific example

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12/26/20

Analyze Le Chatelier’s principle. Based on this theory, what is the overriding guide to predicting outcomes when changes are imposed upon a reaction. What is the impact on equilibrium?

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12/26/20

connect each of these circumstances to the rate of a reaction. Explain how the change in circumstances could be implemented in a lab and describe the predicted outcome: 
1: Increased temperature 2: Decreased solution concentration 3: increased surface area4: speeding up the reaction without being involved in the reaction 
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12/23/20

Corrosion cell on electrochemistry

Write the equations of selective corrosion of the alloy Cu/Zn in a neutral medium and in a medium of H3PO4.
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12/23/20

Electrochemistry (galvanic cells)
1.Draw cell diagrams of galvanic cells one of which Mn is the anode, the other − the cathode.    Write the electrode reactions.    Calculate E0cell.2. Calculate the potential of Cr-electrode... more
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12/23/20

General Chemistry

1. Draw cell diagrams of galvanic cells one of which Zn is the anode, the other − the cathode. Write the electrode reactions. Calculate E0cell. 2. Calculate the cell potential of Mg/Nigalvanic cell... more
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12/23/20

Please help me solve this
Barium-139 has a half-life of 86 minutes. If we start with a 10 gm sample of Ba-139, how much time will elapse before the remaining amount of Ba-139 is 1 gm?
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12/22/20

Equilibrium - LeChatelier's Principle and the Keq
I am given this equilibrium equation : Co(H2O)6+2 + 4Cl - <==> CoCl4-2 + 6H2OI need to find the concentrations of each of the compounds in order to calculate for the value of Keq. I know the... more
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12/21/20

Is the decomposition of dinitrogen tetroxide to nitrogen dioxide is in equilibrium total pressure of 1.5 bar and a temperature of 298K?
State whether the decomposition of dinitrogen tetroxide to nitrogen dioxide is in equilibrium when the reaction is at a total pressure of 1.5 bar and a temperature of 298K. The mole fraction of... more
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12/21/20

If you had 15 grams of nitrogen gas mixed with 4 grams of hydrogen, what would the maximum amount (in grams) of ammonia that would be theoretically produced?
balenced reaction: N2 (g) + 3H2 (g)  2NH3 (g)If you had 15 grams of nitrogen gas mixed with 4 grams of hydrogen, what would the maximum amount (in grams) of ammonia that would be theoretically... more
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12/21/20

Why are elements and compounds considered substances?
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12/21/20

Double Replacement Chemical Reactions
In double replacement chemical, two ionic compounds switch partners.I'm suppose to look up the solubility table to determine if the reactions will take place.I'm confuse if I'm suppose to look up... more
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12/21/20

Synthesis Chemical Reaction
I'm wondering if synthesis chemical reaction, a compound is usually form by: solid + gas = solid solid + liquid = solidIf a solid + water (l), product is (aq)?Is it possible for solid + solid =... more
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12/19/20

Draw the lewis interaction and the result after the interaction for the following ionic compounds: magnesium bromide and rubidium phosphide

Could you please answer this question and help me out, I am having trouble with it.
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12/19/20

I need help with these two, I've been stuck on them for a while
Write the equation to represent the hydrolysis reaction between ethylamine, C2H5NH2, a weak base, and water. Identify the acid, the base, the conjugate acid, and the conjugate base.Calculate the... more
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12/19/20

Titration of NH3 with HCl
Titrate 10 cm3 of 0.1 M NH3 solution with 0.1 M HCl solution (factor= 0.998). After how many cm3 of HCl have been added, the pH of the oldst will be 8.8?
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12/19/20

How many molecules are present in 25.00 g of water

Pls help idk how to do this
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