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Questions (4)
One chirality of CH3CHlCOOH is shown below.
Identify the image(s) below that exhibit the opposite chirality. Select all that
3 answers
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Butene H2C=CH-CH2-CH3 can be reacted to form isotactic polybutene (PB).
(a) Would you expect isotactic polybutene to melt at a
1 answer
991 views
H8P1: Polystyrene
The monomer structure of polystyrene is shown below: (a) Would you expect polystyrene to be a stiff or a
1 answer
818 views
A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.31 kg m-3. Under these conditions the
1 answer
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Answers (26)
same here had 39.2 as the wrong answer.
how to convert j/mol to EV?
How do you use the above data and insert into the formula?
frequency(wavelength)=speed of light. solve for frquency.
a) 6.22*10^18 No idea for b) any thoughts or how to for b)?
thank you
Yup it gave me a big red X.
Molar mass of PbO: 446.4 g/mol Molar mass of Pb: 621.6 g/mol (830000g/446.4)*621.6 = convert answer from g to kg
Could someone insert the formula and data, at least it gives an idea in how-to answer the question?
Still having problems with this one! Any thoughts!
Could someone give the formula and where the data is inserted?
Any ideas for b)
(a) 10^-12*27*(x)^4 replace x with the solubility you have 10^-12*27(4.891 x 10-3)^4 x=4.891x10^-3 (as taken from a)*is this the solubility 1.54509225456e-20 (it was wrong) What when wrong?
a)3.03*10^-8 b) 2.14*10^-8 any ideas for c)?
Any ideas for b) ?
Thks :)
How did you convert kg/s to g/hr
Did not get it right! could you input the data above into the formula? Thank you
42.8 is wrong! could you input the data above into the formula? Thank you
Step 1: ξ= (0.5 * carbon concentration at the surface of the steel - carbon concentration at the surface of the steel)/ (carbon concentration in the steel before carburization - carbon concentration at the surface of the steel) (0.5* 7215.0 - 7215.0 )/ (
ξ= (0.5 * carbon concentration at the surface of the steel - carbon concentration at the surface of the steel)/ (carbon concentration in the steel before carburization - carbon concentration at the surface of the steel)
ξ= (0.5 * carbon concentration at the surface of the steel - carbon concentration at the surface of the steel)/ (carbon concentration in the steel before carburization - carbon concentration at the surface of the steel)
How did you get it? could you show the data in the formula? Thank you
Thank you for the info, great help
can someone give me a formula? and what data to use in the formula? thank you
Step 1: (0.5*6695.0 - 6695.0)/ (359.5 - 6695.0)= erf(ξ) Step 2: erf(ξ < 0.6), use the approximation erf ξ = ξ Step 3: t= d^2/4*D*ξ^2 d=38.0 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)
