11/27/19

How to use bond energies to determine the △H for the combustion of methane ?
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11/27/19

What is the sign of △S in the following reaction, CaSO4(s)➡️CaO(s) + SO3(g)
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11/27/19

Which of the following conditions ensures a spontaneous reaction? △H<0, △S<0, △G<0
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11/27/19

Determine the pH
Determine the pH of 9.00E-3 M of sodium hydrogen sulfate and 1.01E-3 M of diethylamine.
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11/27/19

chemistry quizz
What is the pH of a solution containing 0.25 M HNO2 and 0.43 M NaNO2? The solubility of lead chromate (PbCrO4) is 4.5 *10-5 g/L. Calculate the solubility product of this compound.
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11/27/19

chemistry quizz....
Calculate the concentration of H+ions in a 0.62 M NaOH solution. Calculate the pH of 2.8 * 10 -4 M Ba(OH)2 The ka for benzoic acid is 6.5 * 10 -5. Calculate the pH of a 0.10 M benzoic acid... more
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11/27/19

chemistry quiz.....
# 1 Write the Kc and KP for the decomposition of di-nitrogen pentoxide:  2 N2O5 (g) ↔4 NO2(g) + O2(g)#2 Consider the following reaction:  N2(g) + O2(g) ↔ 2NO(g) If the equilibrium partial... more
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11/27/19

rate of reaction
Write the rate expressions for the following reaction:CH4(g)      +  2O2(g) → CO2(g) + 2 H2O(g)#2 question: Consider the reaction N2(g) + 3 H2(g) → 2 NH3(g)Suppose that at a particular... more
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11/27/19

CALCULATE THE MOLALITY OF THE AQUEOUS SOLUTION:
CALCULATE THE MOLALITY OF THE AQUEOUS SOLUTION:1a) 48.2 percent by mass KBr solution1b) 1.22 M sugar (C12H22O11) density = 1.12 g/mL1c) 1. 87 M NaOH density = 1.04... more
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11/26/19

chemistry question
calculate the percent composition for every atom in aluminum carbonate
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11/26/19

chemistry homework help!
Question: A mixture of flammable gas containing carbon oxide (carbon (II) oxide) and hydrogen is produced from the reaction of water vapour with hot carbon. Calculate the total volume of carbon... more
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11/26/19

Of the compounds below, ________ has the smallest ionic separation.
A) RbClB) KF C) SrBr2 D) RbF E) K2SI know the answer, but I would like to know why it is.
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11/26/19

General Chemistry Electrochemistry Math Question 9
At 25 C, the standard hydrogen electrode (SHE) has a half-cell potential that is defined to be 0.00 volts. If the pH is increased at this electrode (keeping everything else the same), at what pH... more
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11/26/19

General Chemistry Electrochemistry Math Question 6
Compute the half-cell potential for reduction of aqueous hydronium ions to hydrogen gas at 0.5 bar and 25 C in buffer solution at pH = 2.87.
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11/26/19

General Chemistry Electrochemistry Math Question 5
A steel railroad bridge uses a zinc sacrificial anode to limit the extent of oxidation of the steel. If a 9.4 kg anode is completely ozidized to Zn2+ over the course of 19.2 years, compute the... more
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11/26/19

General Chemistry Electrochemistry Math Question 4
A standard hydrogen electrode has a half-cell reduction potential of zero at 25 C. Calculate the potential of the half-cell when the pH is 7.5 and the pressure of H2 is 4.7 bar.
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11/26/19

General Chemistry Electrochemistry Math Question 3
Use a table of standard thermodynamic values to predict the standard cell potential at 80 C:Cu(s) | CuSO4 | | AgNO3 | Ag(s)
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11/26/19

General Chemistry Electrochemistry Math Question 2
Suppose a 6-volt battery is delivering a steady current of 1 A for a period of 4 hours. Calculate the total charge in coulombs that passes through this circuit.
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11/26/19

General Chemistry Electrochemistry Math Question

Predict the potential for the following voltaic cell at 25 C:Cu(s) | CuSO4 (1.74 M) | | AgNO3(0.5 M) | Ag(s)
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11/25/19

A sample of neon at 30.5 C exerts a pressure of 701 mm Hg. What is its density?
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11/25/19

A doctor orders 0,075 g of chlorpromazine, which is used to treat schizophrenia. If the stock solution is 2,5% (m/v), how many milliliters are administered?
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11/25/19

If you have 5.8x10^23 atoms of tin how many liters of hydrogen gas can you make at 1.0 atm and 25C.
Sn + 4 HNO3 ---> Sn(NO3)4 + 2 H2
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11/25/19

Can I get help with Chemistry problem?
a 190ml solution of 2.104M strontium nitrate is mixed with 205ml of a 2.597M sodium fluoride solution. calculate the mass of the resulting strontium flouride precipitate.Also, assuming complete... more
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11/25/19

Can someone help me with the name
Name the following compound: CH3 |CH3-CH-CH=C-CH3 | CH2CH3ive been able to name 3-chlorononyne and 2-chrolobutane, but... more
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11/24/19

Concentration of an Ion

How can I find the concentration of an ion?
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