251 Answered Questions for the topic chemical engineering

06/23/23

The melting point of the re-crystallized salicylic acid has given a range of two or three.......
The melting point of the re-crystallized salicylic acid has given a range of two or three degrees, with upper limit of the range slightly below the (real) literature value of the melting point of... more
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06/23/23

If the material that you are re-crystallizing fails to precipitate out of the cold solvent, propose what would you do to recover the material from the solution?

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06/23/23

Draw the structural formula, IUPAC name and physical properties (color, mp, solubilities) of salicylic acid.

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06/21/23

Primary alcohols and secondary alcohols can be oxidized with chromic acid, but tertiary alcohols cannot. (i) How do the structural differences between the alcohols account for the observed reactions?
Primary alcohols and secondary alcohols can be oxidized with chromic acid, but tertiary alcohols cannot. (i) How do the structural differences between the alcohols account for the observed reactions?
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06/14/23

What is the 3d shape and polarity of 2-butyne?
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06/14/23

What is the 3d shape and polarity of butane?
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06/14/23

name this compound: h3c-ch2-ch=o
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06/14/23

What is the 3d shape and polarity of propanol?
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06/14/23

What is the 3d shape and polarity of 1-amine-1,3-cyclopentadiene?
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06/14/23

What is the 3d shape and polarity of trans-2-butene?
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Chemical Engineering Math Calculus Differential Equations

06/09/23

The number of bacteria in a certain culture grows at a rate that is proportional to the number presentThe number of bacteria increased from 300 to 800 in 2 hours
The number of bacteria in a certain culture grows at a rate that is proportional to the number presentThe number of bacteria increased from 300 to 800 in 2 hours.a. State the initial value problem... more
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Chemical Engineering Math Calculus Differential Equations

06/07/23

check if the differential equation x^2 * y’ = x* y + y^2 is:
check if the differential equation x^2 * y’ = x* y + y^2 is:a) linearb) separable c) Exact
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Chemical Engineering Math Calculus Differential Equations

06/07/23

check if the differential equation x^2 * y’ = x* y + y^2 is:
check if the differential equation x^2 * y’ = x* y + y^2 is:a) linearb) separablec) Exact
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Chemical Engineering Math Calculus Differential Equations

06/07/23

Is differential equation x^2 * y’ = x* y + y^2 a) linear b) separable c) Exact
Is differential equation x^2 * y’ = x* y + y^2a) linearb) separablec) Exact
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Chemical Engineering Math Calculus Differential Equations

06/07/23

Is differential equation x^2 * y’ = x* y + y^2 a) linear b) separable c) Exact
Is differential equation x^2 * y’ = x* y + y^2 a) linearb) separable c) Exact
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Chemical Engineering Math Calculus Differential Equations

05/31/23

Is this diffrential equation linear or non-liner?
1.) y'' + (2/x)*y' + 3 = x^32.) x*y^3 + x^3 *y' - 33.) sin(x)*y^(4) - (1/x)*y^(2) = cos(x)4.) y'' + 2x* (y')^5 = e^4x
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Chemical Engineering Math Calculus Physics

05/25/23

Solve the velocity field of a rigid sphere falling under gravity within a larger sphere
A rigid sphere of radius R1 is falling at a velocity Ui under the action of gravity gi within a larger stationary hollow sphere of radius Ro. The inner sphere is at an instant in time centered on... more
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Chemical Engineering Math Calculus Physics

05/25/23

Calculating the velocity field around a rigid sphere under creeping flow conditions
A Rigid sphere is placed at the origin in the undisturbed linear flow ui∞=Eijxj +Ωijxj where Eij and Ωij are the constant rate of strain and vorticity tensors respectively. Assume the sphere is... more
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Chemical Engineering Math Chemistry Physics

05/11/23

particle on a ring, quantum mechanics
A)Explain the reason why Ψ(x) = Acos(πx/L) is not able to describe a particle of mass m in a ring of length L. B) On the other hand, explain why Ψ(x) = Acos^2(πx/L) is.C) When momentum is... more
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04/26/23

What element in the same group as hydrogen has a larger atomic radius?
What element in the same group as hydrogen has a larger atomic radius? helium  Mercury  rubidium  tungsten  none of the above
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04/26/23

The most common ion for chromium has a charge of 2+. What element in the same period as chromium has a smaller ionic radius?
The most common ion for chromium has a charge of 2+. What element in the same period as chromium has a smaller ionic radius? bromine  calcium  germanium  manganese  none of the above
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04/26/23

What element in the same group as polonium has a lesser electronegativity?
What element in the same group as polonium has a lesser electronegativity?  oxygen  selenium  sulfur  tellurium  none of the above
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04/26/23

What element in the same group as polonium has a lesser electronegativity?
What element in the same group as polonium has a lesser electronegativity?  oxygen  selenium  sulfur  tellurium  none of the above
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04/26/23

The most common ion for lead has a charge of 4+. What element in the same period as lead has a larger ionic radius?
The most common ion for lead has a charge of 4+. What element in the same period as lead has a larger ionic radius?  hafnium  rhenium  thallium  tungsten  none of the above
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Chemical Engineering Math Chemistry Physics

04/02/23

crystal lattice of a material

What is the crystal lattice of a material having the CFC crystal structure with a unit cell consisting of copper (Cu) and silver (Ag) atoms?how the choice of atoms that make up the crystalline... more
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