0
Add your answer:
Earn +20 pts
A cube has a surface area of 24 cm squared What is the volume of the cube?
The volume is 8 cubic cm.
Which of these measurement has 4 significant digits?
1.004 cm
Derivation of BET equation?
IsothermConsider a surface:Definition:q0, q1, ..., qn = Surface area (cm-2) covered by 0, 1, ..., n layers of adsorbed molecules.At Equilibrium:q0 must remain constant. . Rate of Evaporation Rate of Condensation . . = from First Layer onto Bare SurfaceSimilarly, at equilibrium q1 must remain constant. . Rate of Condensation Rate of Condensation . . on the Bare Surface on the 1st Layer + = + Rate of Evaporation Rate of Evaporation from the second layer from the second layer . . . k1Pq0 + k-2q2 = k2Pq1 + k-1q1Substituting into (I) givesk-2q2 = k2Pq1Extending this argument to other layers,Definitions:Total surface area of the catalyst,Total volume of gas adsorbed on surfacewhere v0 is the volume of gas adsorbed on one square centimeter of surface when it is covered with a complete layer. . . .where vm is the volume of gas adsorbed when the entire surface is covered with a complete monolayer.From (I),If we assume that the properties of the 1st, 2nd, ... layers are equivalent, then,Similarly,q3 =xq2 =x2q1Generally,qi =xqi-1 =xi-1q1 =xi-1yq0 =cxiq0 {c=x/y}Substituting into (V),Now,Also, . . .At saturation pressure of gas P0, an infinite number of adsorbate layers must build up on the surface. From equation VII, for this to be possible,must be infinite. This means that at P0, x must equal 1. . . . g = P0(From definition of x) . . . x = P/P0Substituting into VII, we arrive at the recognized form of the BET isotherm,This can be rearranged to give,
What is 0.4 cm?
4 mm
How much is a tenth of a meter in cm?
10
What is the surface area of a 9-centimeter cube?
A 9 cm cube has a surface area of 486 cm2
What is the surface area of a cube 52.5 cm?
The surface area of a cube with side lengths 52.5cm is 16,540cm2
What is the surface area of a cube with the edges of 11cm long?
A cube has 6 faces and each face is square, so the answer is 6*11*11 sq. cm.
Which has the greater surface area a cube 3 cm on a side or a microscopic cube the size of an onion skin cell?
The cube 3 cm on a side has the greater surface area.
What is the surface area of cube that is 8.2 cm on an edge?
The surface area is 403.44cm2
What is the surface area of a cube 7cmx7cmx7cm?
The surface area of a 7 cm cube is 294 cm2
One cube has area of 8 cm what is the surface area of the cube?
34 squares
What is the lateral area of a cube with volume of 216cubic cm?
The surface area of the cube will be about 216cm2
If the cube has a side length of 6 cm what is the surface area of the cube?
216 squared cm
What is the surface area of a cube with sides of 4 cm and 2?
The surface area of a cube with sides of 4 cm is 6*42 square cm = 96 sq cm. The surface area of a cube with sides of 2 units is 6*22 square units = 24 sq units.
What is the surface area of the stack of the cube at the right if each cube has a side of 1 cm?
To find the surface area of a single cube, you calculate the area of each face (6 faces) and add them together. Each face has an area of 1 cm x 1 cm = 1 cm². Therefore, the surface area of one cube is 6 cm². If the stack consists of n cubes, the total surface area would be 6n cm².
What is the surface area of a 20 cm cube?
2400cm2
