Calculate the [H+] in a solution that is 0.18 M in NaF and 0.25 M in HF. (Ka = 7.2 Ã 10â4)
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The following reaction occurs in basic solution: F2 + H2O â O2 + Fâ When the equation is balanced, the sum of the coefficients is:
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15
How many electrons in an atom can have the quantum numbers n = 3, l = 2?
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10
If n=2, what is l and ml respectively?
l = 0, 1; ml= -1, 0, +1
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Given the equilibrium: AgBr(s) <--> Ag+ (aq) + Br-(aq) Ksp = 3.3 x 10-13 If [Br-(aq)] = 0.50 mol/L, what is [Ag+ (aq)]?
6.6 x 10^-13
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20
name an isomer of 2-methylpropane
butane
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10
Which of the following would you expect to have the highest boiling point? ethanol, ethyl ethanoate, ethanoic acid, ethane, ethene, ethyne, ethanal or chloroethane?
ethanoic acid - has the most hydrogen bonding therefore it takes more ENERGY to break those intermolecular bonds. Therefore it should have highest boiling point
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15
Consider the reaction X â Y + Z Which of the following is a possible rate law?
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15
In the following chemical reaction the oxidizing agent is 1. 5H2O2 + 2MnO4 â + 6H+ â 2Mn2+ + 8H2O + 5O2
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For the reaction: Ag+ (aq) + Cl-(aq) <--> AgCl(s) ÎH = -127kJ/mol In which direction does the equilibrium shift as a result of adding NaCl?
to the right
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20
Given the following reaction in acidic media: Fe2+ + Cr2O72â â Fe3+ + Cr3+ answer the following question: The coefficient for water in the balanced reaction is:
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Calculate the [H+] in a solution that is 0.18 M in NaF and 0.25 M in HF. (Ka = 7.2 Ã 10â4)
