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77julia77 [94]
4 years ago
14

PLEASE HELP I DONT UNDERSTAND A THING

Chemistry
1 answer:
Ymorist [56]4 years ago
6 0

Answer:

I and III

Explanation:

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Nitrogen is used to keep food frozen during transportation.
Greeley [361]

Answer:

Gaseous nitrogen has unique chemical and physical properties that make it suitable for use in food processing. Nitrogen is inert which means it will not react with prepared food materials, which can alter their aromas or flavors. Also, gaseous nitrogen will effectively displace oxygen minimizing oxidation and the growth of microorganisms that cause foods to lose their freshness and deteriorate faster.

Explanation:

Source: https://www.generon.com/using-nitrogen-gas-in-food-packaging/

4 0
3 years ago
Calculate the value of the diffusion coefficient D (in m2/s) at 547°C for the diffusion of some species in a metal; assume that
svetlana [45]

Answer : The value of diffusion coefficient is, 2.97\times 10^{-16}m^2/s

Explanation :

Formula used :

D=D_o\times \exp \left(-\frac{Q_d}{RT}\right )

where,

D = diffusion coefficient = ?

D_o = 5.6\times 10^{-5}m^2/s

Q_d = 177kJ/mol

R = gas constant = 8.314 J/mol.K

T = temperature = 547^oC=273+547=820K

Now put all the given values in the above formula, we get:

D=5.6\times 10^{-5}m^2/s\times \exp \left(-\frac{177kJ/mol}{(8.314J/mol.K)\times (820K)}\right )

D=2.97\times 10^{-16}m^2/s

Thus, the value of diffusion coefficient is, 2.97\times 10^{-16}m^2/s

6 0
3 years ago
What is the hardest subject u ever taking, mine is chemistry
artcher [175]

Answer:

Mine is language arts brainliest?

Explanation:

7 0
3 years ago
An idle ball on a hilltop, though not moving, contains _____.
vampirchik [111]

potential energy because it has a potential to roll down the hill, creating kinetic energy. it is idle

6 0
3 years ago
I don’t know it A is correct please tell me the right answer
Greeley [361]

I do believe the answer is A. Hope this helps.

8 0
3 years ago
Read 2 more answers
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