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solniwko [45]
4 years ago
9

Which phrase describes the defining feature of a system? A. Interactional force B. Collisions that change properties C. Interact

ions between a group of things D. Gravitational force Thanks
Chemistry
1 answer:
Rina8888 [55]4 years ago
3 0

Answer:

C. Interactions between a group of things

Explanation:

A system is made up of many parts. These parts combines together and gives  the system its overall functionality.

The interaction between the different parts to attain a common goal or purpose is the most distinguishing feature of a system. In the human body, the circulatory system moves blood round the body in order to move food from one place to another and to provide energy. Some parts of the circulatory system functions to take the blood into the areas where they can undergo gaseous exchange, some goes to the kidney where wastes are removed e.t.c these interacting parts of the circulatory system gives its function.

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Glucose, c 6 h 12 o 6 , is a good source of food energy. when it reacts with oxygen, carbon dioxide and water are formed. how ma
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<h3>Explanation</h3>

The molar mass of glucose C₆H₁₂O₆ is

12.01 × 6 + 1.008 × 12 + 16.00 × 16.00 = 180.16 g / mol.

126 grams of glucose will contain 126 / 180.16 = 0.69939 mol of C₆H₁₂O₆. (To avoid rounding errors, keep a couple more digits than necessary.)

6 moles of CO₂ will be produced when 1 mole of C₆H₁₂O₆ is consumed. 0.69939 moles of C₆H₁₂O₆ will give rise to 4.196 mol of CO₂.

Assuming that the reaction takes place under STP, where T = 0 °C = 273 K and P = 1 atm. Each mole of any ideal gas will occupy a volume of 22.4 liters. The 4.196 moles of CO₂ will occupy 4.196 × 22.4 = 94.0 L. (The least significant number given is 126 g, the mass of glucose. This number has three significant figures. Thus, round the result to three significant figures.)

The volume of CO₂ can be found using the ideal gas law if the condition isn't STP. For example, T = 25 °C = 297 K and P = 1.00 × 10⁵ will lead to a different volume. By the ideal gas law,

V = (n · R · T) / (P)

where

  • V is the volume of the gas,
  • n is the number of moles of gas particles,
  • R is the ideal gas constant<em>,</em>
  • P is the pressure on the gas,
  • T is the absolute temperature of the gas (in degrees Kelvin.)

R = 8.314 × 10³ L · Pa / (K · mol)

Taking T = 297 K and P = 1.00 × 10⁵ Pa,

V = (4.196 × 8.314 × 10³ × 297 ) / (1.00 × 10⁵ ) = 104 L.

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