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Sergeu [11.5K]
3 years ago
13

Who created the onion model in chemistry?

Chemistry
1 answer:
11111nata11111 [884]3 years ago
8 0
Rick Maurer i think that’s how you spell his last name
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All atoms of an element are ___________.
nignag [31]
My answer would be B there you go

5 0
3 years ago
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Calculate the volume of dry co2 produced at body temperature (37 ∘c) and 0.970 atm when 25.5 g of glucose is consumed in this re
katrin2010 [14]

I believe the balanced chemical equation is:

C6H12O6 (aq) + 6O2(g) ------> 6CO2(g) + 6H2O(l) 

 

First calculate the moles of CO2 produced:

moles CO2 = 25.5 g C6H12O6 * (1 mol C6H12O6 / 180.15 g) * (6 mol CO2 / 1 mol C6H12O6)

moles CO2 = 0.8493 mol

 

Using PV = nRT from the ideal gas law:

<span>V = nRT  / P</span>

V = 0.8493 mol * 0.08205746 L atm / mol K * (37 + 273.15 K) / 0.970 atm

<span>V = 22.28 L</span>

6 0
3 years ago
describe how these nutrients and elements such as carbon, oxygen, and nitrogen are cycled through ecosystems.
Diano4ka-milaya [45]

Answer:

Carbon Cycle

Steps of the Carbon Cycle

  • CO2 is removed from the atmosphere by photosynthetic organisms (plants, cyanobacteria, etc.) and used to generate organic molecules and build biological mass.
  • Animals consume the photosynthetic organisms and acquire the carbon stored within the producers.
  • CO2 is returned to the atmosphere via respiration in all living organisms.
  • Decomposers break down dead and decaying organic matter and release CO2.
  • Some CO2 is returned to the atmosphere via the burning of organic matter (forest fires).
  • CO2 trapped in rock or fossil fuels can be returned to the atmosphere via erosion, volcanic eruptions, or fossil fuel combustion.

Nitrogen Cycle

Steps of the Nitrogen Cycle

  • Atmospheric nitrogen (N2) is converted to ammonia (NH3) by nitrogen-fixing bacteria in aquatic and soil environments. These organisms use nitrogen to synthesize the biological molecules they need to survive.
  • NH3 is subsequently converted to nitrite and nitrate by bacteria known as nitrifying bacteria.
  • Plants obtain nitrogen from the soil by absorbing ammonium (NH4-) and nitrate through their roots. Nitrate and ammonium are used to produce organic compounds.
  • Nitrogen in its organic form is obtained by animals when they consume plants or animals.
  • Decomposers return NH3 to the soil by decomposing solid waste and dead or decaying matter.
  • Nitrifying bacteria convert NH3 to nitrite and nitrate.
  • Denitrifying bacteria convert nitrite and nitrate to N2, releasing N2 back into the atmosphere.

Oxygen Cycle

Oxygen is an element that is essential to biological organisms. The vast majority of atmospheric oxygen (O2) is derived from photosynthesis. Plants and other photosynthetic organisms use CO2, water, and light energy to produce glucose and O2. Glucose is used to synthesize organic molecules, while O2 is released into the atmosphere. Oxygen is removed from the atmosphere through decomposition processes and respiration in living organisms.

Explanation:

6 0
3 years ago
The specific heat of asphalt is 920 J/kg °C. How much heat energy is required to raise the temperature of 113 kilograms of aspha
Gnom [1K]
C BECUSSE THE X AND Y
8 0
4 years ago
Which statements about spontaneous processes are true? Select all that apply: A spontaneous process is one that occurs very quic
Mkey [24]

Answer: Here are the complete options.

A spontaneous process is one that occurs very quickly. A process that is spontaneous in one direction is nonspontaneous in the other direction under a given set of conditions, provided the system is not at equilibrium. A spontaneous process is one that occurs without continuous input of energy from outside the system. A process is spontaneous if it must be continuously forced or driven.

The correct option is

A spontaneous process is one that occurs without continuous input of energy from outside the system.

A process that is spontaneous in one direction is nonspontaneous in the other direction under a given set of conditions, provided the system is not at equilibrium

Explanation:

spontaneous process is one that occurs without continuous input of energy from outside the system and occur on its own because spontaneous processes are thermodynamically favorable characterized by a decrease in the system's free energy, they do not need to be driven by an outside source of energy. Which means that the initial energy is higher than the final energy.

A process that is spontaneous in one direction is nonspontaneous in the other direction under a given set of conditions, provided the system is not at equilibrium which will result to The sign of ΔG will change from positive to negative (or vice versa) where T = ΔH/ΔS. In cases where ΔG is: negative

4 0
4 years ago
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