Tuesday
May 21, 2013

# Posts by Audrey

Total # Posts: 288

chemistry
x + 2y ---> products is first order in c and 2nd order in y. what are the units of K, the specific rate constant, if the reaction rate is expressed in units of moles per liter per sec. I know the answer is M.s^-1^ but I don't understand this concept. could you explain t...

chemistry
From this information- a + c_2_ ---> ac + c Slow ac + a ---> a_2_c Fast 2a + c_2_ ---> a_2_c + c Overall -you know that it is 1st order in a, 1st in c2, and 2nd overall. how? what about a reaction being fast or slow tells you if it's in first or second order?

chemistry
SF4 ---> SF2 + F2 rate constant (k) = .011 l/molxS [SF4]2 How many minutes will it take for the concentration of SF4 to be reduced from 2.5 M to .25 M? I said this was a 2nd order reaction and used : (1/final)= kt + (1/initial) and solved for t. the answer should be 5.5. I ...

chemistry
How do you know that from this list, F2 is the strongest oxidizing agent? Mg2+ Mg F2 F- H+ Why is F- the weakest reducing agent from this list? Al3+ Al F2 F- K+

chemistry
In the following equation, which species is the oxidizing agent? KCLO3 --> KCL + KCLO4 In the same are, How do you know that Cu is the reducing agent in this equation: AgNO3 + Cu ---> Cu(NO3)2 + Ag

chemistry
Calculate the Gibbs free energy change for the reaction below when initial concentrations of CR3+ and Cu2+ are 1 M (F= 96500 J/V mole e-) 2Cr3+ (aq) + 3Cu (s) --> 2Cr (s) + 3Cu2+ (aq) I assume we use the deltaG= -nFE equation, but how do you know n when Cr is using 3 e- and...

chemistry
a cell is constructed by immersing a strip of silver in .10 M AgNO3 solution and a strip of lead in 1.0 M Pb(NO3)2 solution. A wire and salt bridge complete the cell. What is the potential of the silver electrode in the cell?

jordan has 2 quarters, 1 nickel, and 3 dimes. if he took 1 out and then a second one without replacing the first coin, what is the probability that both coins were dimes?

chemistry
thanks!

chemistry
A(g)+ B(g) <---> C(g) + D(g) Kc= 144. If .4 mol of A and B are placed in a 2 Liter container, what will be the concentration of C at equilibrium? I said the concentration of A= .2 because (.4/2=.2) and because 1 mol of A = 1 mol of C, the concentration of C also = .2 But...

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