Rates
Select the correct equilibrium constant expression for the following reaction: Ga2O3(s) + 3H2 (g)<=> 2Ga(s)+ 3H2O(g)
A) Kc= [Ga2O3} [H2]^3/[Ga]^2[H2O]^3
B) Kc= [Ga] [H2O] / [Ga2O3] [H2]
C)Kc= [Ga]^2[H2O]^3/[Ga2O3][H2]^3
D) Kc=[H2]/[H2O]
E) Kc=[H2O]^3/[H2}^3
E) Kc=[H2O]^3/[H2}^3
A certain electrochemical cell has for its cell reaction: Zn + HgO <=> ZnO + Hg
Zn <=> Zn ^2+ +2e-
A student has incorrectly named an organic structure 4,5-diethylhexane. What is the correct name?
4-ethyl-3methylheptane
When carbon dioxide gas bubbles through water to produce a carbonic acid solution, a Lewis acid/ base reaction takes place. The Lewis acid in this reaction is what substance?
a) water
b) carbon dioxide
c) carbonic acid
d) the H+ produced
e) None of these
b) carbon dioxide
If pka=-log(ka), then pdiddy=?
-log(diddy)
For the second-order reaction below, the initial concentration of reactant A is 0.24M. If the rate constant for the reaction is 5.5X10 ^-3 M ^-1S^-1, what is the concentration of A after 265 seconds?
2A -> B + C, Reaction rate = [ A]^2
0.18M
How many coulombs of charge are required to cause reduction of 0.30 mole of Cr^3+ to Cr?
8.7 X 10 ^4C
Which of the following molecules might be an alkyne?
a) C7H16
b) C8H16
C) C10H18
D) C9H20
E) None of these
C) C10H18
concentrated sodium hydroxide is 19.4M and has a density of 1.54g/mL. what is the molality of concentrated NaOH?
25.4
Who was in Paris?
The pl Georgina
For the reaction A+2B -> C, the rate law is =k [A][B] what are the units of the rate constant where time is measured in seconds?
1/Ms
The element cobalt and nickel are adjacent in the periodic table. The standard reduction potentials of divalent ions of the two elements are -0.28V and -0.25V, respectively. Consider a voltaic cell consisting of a cobalt half cell connected to a nickle half cell via a salt bridge. In the spontaneous process,
Cobalt metal reduces nickel ion and cobalt is the anode
How many lone pairs, sigma bonds, and pi bonds are in ammonia?
1 lone pair, 3 sigma bonds, 0 pi bonds
Consider the following substances :
1) HClO3 2)HClO4 3)H2SO3 4) H2SO4 5)HNO2 6) HNO3
All of these are strong acids except
3 and 5
Best qb in the NFL
Patrick Mahomes
Consider the following reactions and their associated equilibrium constants:
A + 2B <=> C. K1
D + E <=> C. K2
Thus, for the reaction A + 2B <=> D + E, having equilibrium constant Kc,
a) Kc= K1 + K2
b) Kc= K1/K2
c) Kc= K1 - K2
d) Kc = K1 X K2
e) Kc = K2/K1
d) Kc = K1 X K2
For the reaction H2(g) + S(s) <=> H2S(g), deltaH= -20.2 kj/mol and deltaS= -43.1 J/K mol. Which of these statements is true?
The reaction is only spontaneous at low temperatures.
This compound belongs to which class of compound H3COCH3?
a) ether
b) alcohol
c) Ketone
d) Aldehyde
e) carboxylic acid
a) ether
The OH- concentration in a 1.0X10^-3 M Ba(OH)2 solution is.
a) 0.50 x 10 ^-3 M
b) 1.0 x 10^-2 M
c) 1.0 x 10 ^-3 M
d) 2.0 x 10 ^-3 M
e) None of these
d) 2.0 x 10 ^-3 M
What is the similarity between Michelangelo and Kurt Cobain?
They both painted the ceiling with their heads.
For the reaction:
2 NO₂(g) → 2 NO(g) + O₂(g)
The rate law is found to be:
rate = k[NO₂]²
If the concentration of NO₂ is tripled, by what factor does the rate increase?
Rate increases by factor of 9
Complete and balance the following redox equation that occurs in acidic solution using the set of smallest whole-number coefficients. What is the sum of all the coefficients in the equation?
PbO2(s) + Cl– → Pb2+ + Cl2(g) (acidic solution)
11
Which one of the following does not contain a carbonyl group?
a) hexanoic acid
B) 2-butanone
C) Ethanal
D) Acetic acid
e)All contain carbonyl group
e) all contain carbonyl group
what is the net ionic equation for the reaction that occurs when small amounts of hydrochloric acid are added to a buffer solution containing the HOCl/NaOCl buffer?
a) H+ + H2O <=> H3O+
b) H+ + HOCl <=> H2OCl+
c) H+ + OCl- <=> HOCl
d). HCl + HOCl <=> H2O + Cl2
e) HOCl <=> H+ + OCl-
c) H+ + OCl- <=> HOCl
Who created the national anthem?
Lana del Rey
Half points if you say Francis Scott Keys 🙄