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olga_2 [115]
3 years ago
14

Name and describe the phase change that occurs when solid carbon dioxide (dry ice) is placed in an open container at room temper

ature
Biology
1 answer:
Valentin [98]3 years ago
8 0

If you put a lump of solid carbon dioxide (dry ice) in a paper cup or
on a paper plate on the kitchen counter, it gets smaller and smaller
and finally it just disappears, but you never see a puddle around it
like you would with regular ice!

Carbon dioxide has no liquid phase when the pressure on it is less than
about 5 times normal atmospheric pressure.  So in the kind of pressure
that we like to live in, dry ice goes straight to gas when it melts.  That kind
of behavior is called "sublimation", and we say that the dry ice "sublimes".

Every substance has some pressure limit like that.  For water, it's 0.006 of
normal atmospheric pressure.  At any pressure lower than that, liquid water
can't exist, and an ice cube sublimes ... it melts directly into water vapor
without a puddle.

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Producers, consumers, and decomposers play important roles in the environment. Are there any organisms that would not fall into
choli [55]

Answer:

No, there are no organisms that will not fall into these categories

Explanation:

Living organisms interact with one another in their natural environment in order to ensure that energy needed for their metabolic activities is obtained. To do this, each organism plays different or specific roles. The roles that every organism must fall into are as follows:

- Producers are groups of organisms that have the ability to synthesize their own food using light (photosynthesis) or chemicals (chemosynthesis). Examples are green plants, algae, some bacteria etc.

- Consumers- These are organisms that lack the ability to synthesize their own food and hence depend on other organisms for their energy source. Consumers can either be herbivores (eat plants) or carnivores (eat flesh) etc. Examples are all animals etc.

- Decomposers- These are organism that have the ability to breakdown dead organisms into organic matter, thereby, adding nutrients back to the soil. Examples are fungi, bacteria, earthworm etc.

Based on this explanation above, no organism will not fall into any of these three categories. Some can even occupy two roles.

8 0
2 years ago
What is the volume of ethyl alcohol solution in a a 70% 250 ml
mafiozo [28]

175 ml Ethyl Alcohol

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4 0
2 years ago
What are condensation nuclei?
Furkat [3]

Answer:

Cloud condensation nuclei or CCNs are small particles typically 0.2 µm, or 1/100 the size of a cloud droplet on which water vapor condenses. Water requires a non-gaseous surface to make the transition from a vapour to a liquid; this process is called condensation.

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8 0
2 years ago
Read 2 more answers
To test a hypothesis, a scientist designs a(n)______
charle [14.2K]
  experiment, in the scientific method the hypothesis is tested through experimentation and if confirmed is called a theory.
6 0
3 years ago
10. En la orina de composición química normal, podemos encontrar sólo:
Alex

Answer:

a. Agua, Glucosa y Urea

Explanation:

La orina es el producto final del trabajo del tracto urinario (producto de la función renal durante el proceso de filtración de la sangre). La orina elimina todos los productos del metabolismo solubles en agua del cuerpo: urea, ácido úrico, creatinina, sulfatos, fosfatos, electrolitos, sustancias tóxicas, fármacos y agentes de contraste.

La composición normal de la orina consiste en: agua (95%) y compuestos orgánicos.

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3 years ago
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