What is the pH of a solution made of 0.50 M acetic acid and 0.200 sodium acetate given the Ka of acetic acid is 1.8 x 10-5?
4.34
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20
What is the hybridization of a carbon in ethene?
sp2
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20
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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15
Find the rate equation:
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25
Identify the following atom or ion from the electron configurations. Y - : 1s22s22p63s23p64s23d104p65s24d105p6
Iodine anion
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25
The air pollutant NO is produced in automobile engines from the high temperature reaction: N2 (g) + O2 (g) D 2NO(g) Keq = 1.7 x 10-3 at 2300K. If the initial concentration of N2 (g) and O2 (g) at 2300K are both 1.40M, what is the concent
1.372 mol/L
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20
For the reaction 2A + 4Bâ2C + 2D, at a particular instant in time, the rate of the reaction is 0.0352 M/s. What is the rate of change of B?
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10
The oxidation number of Fe in K3Fe(CN)6 is:
+3
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20
Which one of the following is a redox reaction? a) 2KBr(aq) + Pb(NO3 )2 (aq) â 2KNO3 (aq) + PbBr2 (s) b) 2Al(s) + 3H2SO4 (aq) â Al2 (SO4 )3 (aq) + 3H2 (g) c) CaBr2 (aq) + H2SO4 (aq) â CaSO4 (s) + 2HBr(g) d) H+ (aq) + OHâ (aq) â H2O(l)
Which type of alcohols are oxidized to produce carboxylic acids?
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5
When an electron falls to a lower energy level it:
Emits light
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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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15
Which of the following would have the highest boiling point?