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Ymorist [56]
3 years ago
12

Sodium burns in chlorine to form sodium chloride, NaCl. How many grams of sodium chloride will be formed when 1.8 g of sodium is

burned in 2.00 g of chlorine? What is the excess reactant in this reaction? What is the limiting reactant? How much of the excess reactant remains unreacted?
Chemistry
1 answer:
likoan [24]3 years ago
7 0
I think its Na as excess and Cl as limiting reagent and amount left unreacted is 0.021 mol
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According to the law of conservation of energy, the energy released by the system must be transferred to and absorbed by the sur
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True! 
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3 years ago
If aluminum is diffused into a thick slice of silicon with no previous aluminum in it at a temperature of 1100˚C for 8 hours, wh
RideAnS [48]

Answer:

8.354 nanometers

Explanation:

To treat a diffusive process in function of time and distance we need to solve  2nd Ficks Law. This a partial differential equation, with certain condition the solution looks like this:

\frac{C_{s}-C{x}}{C_{s}-C_{o}}=erf(x/2\sqrt{D*t})

Where Cs is the concentration in the surface of the solid

Cx is the concentration at certain deep X

Co is the initial concentration of solute in the solid

and erf is the error function

Then we solve right side,

\frac{C_{s}-C{x}}{C_{s}-C_{o}}=\frac{1018atoms/cm3-1016atoms/cm3}{1018atoms/cm3}=0.001964

And we need to look up the inverse error function of 0.001964 resulting in: 0.00174055

Then we solve for x:

x=0.00174055*2*\sqrt{D*t} =0.00174055*2*\sqrt{2*10^{-12}cm^{2}/s*8h*3600s/h}=8.35464*10^{-7}cm

6 0
3 years ago
13. Which could be true about an unknown sample with a pH of 7? (2 points)
laiz [17]
The best and most correct answer among the choices provided by your question is the first choice or letter A.

A ph of 7 contains only water.

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
5 0
3 years ago
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a sample of ammonia contains 9g hydrogen and 42g nitrogen. another sample contains 5g hydrogen .calculate the amount of nitrogen
balandron [24]
9 g of hydrogen - 42 g of nitrogen
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The mass of nitrogen in the second sample is 23.33 g.
4 0
3 years ago
I’m taking a test!! Please help!!
777dan777 [17]

Answer:

I am not really sure, but I think Fr.

Explanation:

8 0
3 years ago
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