Use the kinetic model of gases to explain why light gases, such as H2 and He, are rare in the Earth's atmosphere but heavier gases, such as O2, CO2, and N2 are abundant.
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Use the kinetic model of gases to explain why light gases, such as H2 and He, are rare in the Earth's atmosphere but heavier gases, such as O2, CO2, and N2 are abundant.
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- With the advent of photosynthesis, the amount of oxygen in the atmosphere has varied over the eons up to 35 % by volume, theoretically leading to larger plants and animals. The current concentration is 21 % oxygen, 78 % nitrogen, and 1 % other gases such as argon and carbon dioxide. Assuming an atmosphere of 16 % oxygen, to the nearest whole number (no decimal) what would be the ideal volume of water (in mL) initially placed in a 25 mL graduated cylinder (assuming the graduation goes up to the lip of the container) for optimal combustion (biggest explosion) if we collected pure hydrogen by displacement as in this experiment? Make sure to account for the stoichiometry of the combustion, that all gases involved are diatomic, and that equal moles of different ideal gases occupy equal volumes at the same temperature. Answer:The law of conservation of matter states that no matter on earth can be created or destroyed. Using the following equation: 6H2O + 6CO2 + Sunlight—> C6H12O6 + 6O2, explain how the process of photosynthesis is an example of this.You may not be familiar with all the gases shown above: • O2: Oxygen gas makes up about 20% of the earth's atmosphere. • N2: Nitrogen gas makes up about 78% of earth's atmosphere • CO2: carbon dioxide gas makes up about 0.04% of earth's atmosphere, but levels are increasing due to fossil fuel combustion. • TFE: tetrafluoroethane is a human-made gas used in air conditioning. Levels in the atmosphere are low (about 10 parts per trillion or 0.000000001%), but increasing Which gases cause the greatest warming? Use evidence from your observations to support your statement.
- A) Briefly explain what oxygen is? B) Is the surplus of oxygen in our atmosphere a requirement for life, or a product of life? provide 3 points of evidence with explanation of each pointw i 1) Destruction of the ozone layer takes place when its component ozone (03) is converted O3 + 0202 into oxygen gas (O2) as shown by the following chemical equation. Although degradation of O3 happens naturally, there are some man-made substances that cause this process to take pla ce at a rate which is harmful to the environment. One such substance is chlorofluorocarbon or CFC. In the presence of ultraviolet (UV) radiation, a de chlorine (Cl) atom from CFC reacts with O3 and converts it to 02 at a faster rate. This is Cl + O3 → Clo + O2 Clo + 0- Cl + O2 shown by the 2 equations below. In this process, the chlorine atom acts as 2) Pepsin is an enzyme present in gastric juice. In the stomach, it catalyzes the breaking ! down of proteins into shorter polypeptides. Therefore, proteins are of pepsin. the 3) The unstable compound that is formed when the disaccharide maltose binds with the active site of the enzyme maltase is called 4) The binding of ATP with the enzyme pyruvate kinase…Explain why an increase in oxygen in the atmosphere to 50 percent would be dangerous to living things?
- There are approximately 1022 molecules in a single medium-sized breath of air and approximately 1044 molecules in the atmosphere of the whole Earth. So how many breaths of air are there in the Earth’s atmosphere? How does this number compare with the number of molecules in a single breath?Explain how living things recycle oxygen in Earth’s atmosphere.Why is oxygen when unbound to any other material can be toxic to life?
- Draw Electron distribution diagram.Identify all of the elements in the paragraph above. Use your periodic table along with what you learned in live lesson to make your own chart of those elements when they are oxidized..According to the Berner Classification for aqueous environments, which of the following definitions describes the Postoxic stage? O a. Dissolved Oxygen 1mM of Sulfide Species O c. Dissolved Oxygen 0.5% of Saturation (~1 mM) Plants can assist in geochemical metal exploration, because: O a. they carry mineral grains to the surface O b. none of the other options O c. they produce gases that can be analysed between their roots O d. they transport dissolved metals to the surface through their roots