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Verizon [17]
3 years ago
13

Can anyone answer this? I really need it. Thank you in advance.

Mathematics
2 answers:
Vika [28.1K]3 years ago
6 0

Answer:

The answer is 1700cm²

Step-by-step explanation:

The formula is A=2(wl+hl+hw)=2(5*20+30*20+30*5)=1700cm²

storchak [24]3 years ago
3 0

Answer:

1200+300+200=1700 cm^2

Step-by-step explanation:

multiply each of the dimentions by each other such as 30 cm by 20 cm to get the surface area of one part, do this for each of the sides.

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The gas co2 is diffusin at steady state through a tube 20 cm long having a diameter of 1 cm and containing n2 at 350 k . the tot
Marrrta [24]

The value is J = 1.71*10^-6 kmol/m^2.s

According to the given conditions we get,

The length the tube l= 0.20m

The diameter of the tube d= 0.01m

The total pressure inside the tube P= 101.32kPa

The partial pressure of CO2 at the first end is

P1= 456mm Hg = 60794.832 Pa

The partial pressure of CO2 at the other end is

P2= 76mm Hg = 10132.472 Pa

The temperature is T = 298 K

The diffusion coefficient D= 1.67* 10^-5 m^2/s

Generally the molar flux of CO2 is mathematically represented as

J= D{p1-p2} / R.T

Here R is the gas constant with value R= 8.314 j/kmol

So we get J= 1.71 * 10^-3 mol/m^2.sec

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4 0
2 years ago
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