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KatRina [158]
3 years ago
6

Would a salt-cured egg be a physical or chemical change?

Chemistry
1 answer:
Vera_Pavlovna [14]3 years ago
5 0

Answer:

I believe it is a physical change

Explanation:

The telltale sign of a chemical change is the formation of a new substance. They also usually involve the production of energy (heat, light, sound etc.)

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At 850K, 65L of gas has a pressure of 450kPa. What is the volume (in liters) if the gas is cooled to 430K and the pressure decre
Novosadov [1.4K]

Answer:

V₂ =  45.53 L

Explanation:

Given data:

Initial temperature = 850 K

Initial volume = 65 L

Initial pressure = 450 KPa

Final temperature = 430 K

Final pressure = 325 KPa

Final volume = ?

Solution:

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

V₂ = P₁V₁ T₂/ T₁ P₂  

V₂ = 450 KPa× 65 L × 430 K / 850 K × 325KPa  

V₂ = 12577500 KPa .L. K / 276250 K. KPa

V₂ =  45.53 L

8 0
3 years ago
An ideal gas has a volume of 5.00L under a pressure of 1.00 atm and a temperature of 10.0 K. If the temperature is changed to 10
tigry1 [53]

Answer:

6.25 L

Explanation:

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

7 0
3 years ago
Which compound plays an important role in leather processing and electroplating?
Margaret [11]

<u>Answer;</u>

  • Hydrochloric acid

<u>Explanation;</u>

  • Hydrochlorc acid plays a vital role in leather processing and electroplating.
  • Hydrochloric acid has a number of important applications in real life these includes; fertilizers, and dyes, textile, in electroplating, rubber and in the photographic industries.
  • Electroplating is the process that involves coating a metal using another metal for the purpose of improving their appearance or preventing rusting.
  • Hydrochloric acids is used in the processing of leather or the tanning of leather process, in which tanneries use the acid to stop the growth of bacteria and also maintain proper pH.

7 0
3 years ago
Read 2 more answers
Which highly reactive gas was probably absent from the Earth's primitive atmosphere? O2 (oxygen gas) water vapor methane carbon
rosijanka [135]
Oxygen gas was most likely absent from Earth's primitive atmosphere.  The current theory is that the Earth's early atmosphere was composed of mainly carbon dioxide and methane due to the high volcanic activity.  Cyanobacteria and their use of photosynthesis was what caused earth's atmosphere to become oxygen enriched.
I hope that helps.
6 0
3 years ago
Why is the puddle underneath a melting ice cube as cold as the ice cube itself
neonofarm [45]
It's not, if it were it would be ice. The water is a bit warmer.
5 0
3 years ago
Read 2 more answers
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