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1984 AP Chemistry Practice MC ONLY Exam COMPLETE

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1984 AP Chemistry Practice MC ONLY Exam COMPLETE
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A) Cu2+ + SO42– + 2 NH4+ + 2 OH– → (NH4)2SO4
+ Cu(OH)2
B) Cu2+ + 4 NH3 + 4 H2O → Cu(OH)42– + 4 NH4+
C) Cu2+ + 2 NH3 + 2 H2O → Cu(OH)2 + 2 NH4+
D) Cu2+ + 4 NH3 → Cu(NH3)42+
*
Documents
Cu2+ + 2 NH3 + H2O → CuO + 2 NH4+
E)
82.
+ Profile
Step 1
N2H2O2 p N2HO2– + H+
(fast equilibrium)
Step 2
N2HO2– → N2O + OH–
(slow)
Step 3
H+ + OH– → H2O
(fast)
Nitramide, N2H2O2, decomposes slowly in aqueous solution. This decomposition is believed to occur according to
the reaction mechanism above. The rate law for the decomposition of nitramide that is consistent with this
mechanism is given by which of the following?
A)
B)
C)
D)
E)
Rate = k [N2H2O2]
Rate = k [N2H2O2] [H+]
Rate = (k [N2H2O2]) / [H+]
Rate = (k [N2H2O2]) / [N2HO2–]
Rate = k [N2H2O2] [OH–]
83.
5
O (g) p H2NCH2COOH(s) + 3 H2O(l)
2 2
At constant temperature, Δ H, the change in enthalpy for the reaction above is approximately equal to
NH3(g) + 2 CH4(g) +
A) Δ E –
11
RT
2
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