What part of a blade of grass allows the grass to stand up? A. Cellulose B. Glucose C. Monosaccharide D. Disaccharide

12.36Un balón lleno contiene 12 kg de oxígeno, O2, bajo una presión ma-nométrica de 40 atm. Determine la masa de oxígeno que se

const2013 [10]

Answer:

Quedan 7.317 kilogramos de oxígeno en el balón y se extraen 4.683 kilogramos de oxígeno en el proceso.

Explanation:

Asúmase que el balón es rígido. Supongamos que el oxígeno se comporta como un gas ideal, entonces la ecuación de estado es la siguiente:

$P\cdot V = \frac{m\cdot R_{u}\cdot T}{M}$ (1)

Donde:

$P$ - Presión, medida en atmósferas.

$V$ - Volumen, medido en litros.

$m$ - Masa, medida en kilogramos.

$M$ - Masa molar, medida en kilogramos por kilomol.

$T$ - Temperatura, medida en Kelvin.

$R_{u}$ - Constante de los gases ideales, medida en atmósfera-litros por kilomol-Kelvin.

El aire experimenta un proceso isocórico e isotérmico, entonces obtenemos la siguiente relación:

$\frac{P_{1}}{m_{1}} = \frac{P_{2}}{m_{2}}$ (2)

Nótese que los subíndices 1 y 2 representan los estados inicial y final de proceso.

Si sabemos que $P_{1} = 41\,atm$ , $m_{1} = 12\,kg$ y $P_{2} = 25\,atm$ , entonces la masa final del aire es:

$m_{2} = \frac{P_{2}}{P_{1}} \cdot m_{1}$

$m_{2} = \left(\frac{25\,atm}{41\,atm}\right)\cdot (12\,kg)$

$m_{2} = 7.317\,kg$

La masa que se ha extraído del balón es:

$\Delta m = m_{1}-m_{2}$

$\Delta m = 12\,kg-7.317\,kg$

$\Delta m = 4.683\,kg$

Quedan 7.317 kilogramos de oxígeno en el balón y se extraen 4.683 kilogramos de oxígeno en el proceso.

8 0

3 years ago

Pretend to be a green plant and tell me about ur day(make sure it explains photosynthesis) *using all my points*

monitta

Answer:

Plants are made up of roots, stems, and leaves, and most produce flowers, fruit, and seeds. ... Using carbon dioxide, water, nutrients, and energy from sunlight, the chlorophyll makes the food that the plant needs. This process is called photosynthesis. During this process, plants release oxygen into the air. During the day, plants soak up sunlight during photosynthesis, the process they use to get energy. But when the sun goes down, plants' opportunity to eat disappears and other physiological processes take over, including energy metabolism and growth. Plants release oxygen during the day in the presence of natural light through the process of photosynthesis. While at night, the plants uptake oxygen and release carbon dioxide, which is called respiration.

Explanation:

3 0

3 years ago

2. Explain why people with poorly controlled diabetes are at risk for amputation

mestny [16]

People with poorly controlled diabetes are at risk of amputation due to damage of nerves in the extremities of the body. This damage to nerves is caused by chronically high blood sugar. The condition, when it is caused by uncontrolled blood sugar is called diabetic neuropathy.<span>Diabetic neuropathy mostly affects the feet and they lose feeling, such that an affected person cannot sense pain. When they develop an ulcer or small injury to the feet, it may often go unnoticed and with time become infected. High blood sugar impairs the normal healing process and the injury or ulcer may not heal quickly thus compounding the problem. The outcome of this is that the infected part e.g. a toe, may fester and even become gangrenous putting the whole bod at risk and thus the only away to save the rest of the body is removal by amputation.</span>

3 0

3 years ago

What is the role of photosynthesis in the carbon cycle?

NemiM [27]

Your answer should be D

3 0

3 years ago

Read 2 more answers

In 2019, the United Nations assembled a team of scientists to conduct the biggest ever study of

zaharov [31]

Answer:

A