Friday
December 6, 2013

# Posts by Ling

Total # Posts: 41

chemistry
Could someone insert the data into the formula?

chemistry
same here, how to insert the data into the formula?

chemistry
Step 1: (0.5*7715.0 - 7715.0)/ (165.0 - 7715.0)= erf(ξ) Step 2: erf(ξ < 0.6), use the approximation erf ξ = ξ Step 3: t= d^2/4*D*ξ^2 d=61.5 x 10-2 cm D=3.091 x 10-7 cm2/s Step 4: t in sec -> hours Conversion seconds to hours is total/(60x60)

Chemistry
Step 1: (0.5*6910.0 - 6910.0)/ (379.0 - 6910.0)= erf(ξ) Step 2: erf(ξ < 0.6), use the approximation erf ξ = ξ Step 3: t= d^2/4*D*ξ^2 d=13.0 x 10-2 cm D=3.091 x 10-7 cm2/s Step 4: t in sec -> hours Conversion seconds to hours is total/(60x60)

Chemistry
What is b) ?

Chemistry
How to input the data into the formula?

Chemistry
Had 3.24888828e-07 but place 777.78 and had wrong answer. What when wrong?

Chemistry
Answer the following questions by referring to the Cu-Al phase diagram shown below. (a) What is the lowest temperature at which a liquid can be found in a system of any composition of Cu-Al ? (b) A common alloy composition used in airplanes is 4 at. % Cu - 96 at. % Al. For thi...

Chemistry
Thank you

Chemistry
Consider the gold-platinum system which has a value of delta w of -4250 J/mole; (a) Calculate the enthalpy of mixing for a solution of 10% platinum and 90% gold. Express your answer in units of kJ/mole. (b) Is the dissolution of 10% platinum into gold an endothermic or an exot...

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