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Is energy saved if we recycle metals?
Yes, you save all the energy that would have been needed to mine fresh ore from the ground and to extract the metal from that ore. The amount of energy needed to collect and sort the recycled metals is insignificant compared to this (especially for metals like aluminum that are very hard to extract from their ores).You only need to use the energy needed to melt the pure metal, which you would have needed anyway after extraction of new metal from fresh ore.
How does a catalyst speed a reaction at low temperatures?
Catalysts will lower the activation energy needed for a certain reaction to happen. For example in the extraction of Aluminium from Bauxite (Aluminium Oxide) The melting point of Al2O3 is about 2000oC. But with the catalyst Cryolite (Na3AlF6), the overall melting point is lowered to about 950oC,
Can you name the reactants of cellular respiration?
The main reactants of cellular respiration are glucose and oxygen. Glucose, derived from carbohydrates, provides the energy-rich molecules needed for the process, while oxygen is essential for the efficient extraction of energy during aerobic respiration. Together, they undergo a series of metabolic reactions to produce carbon dioxide, water, and ATP, the energy currency of the cell.
Why we can not extract DNA from RBCs?
We can not extract DNA from RBCs as they are without nucleus. only the source of DNA extraction is Leukocytes, RBCs are not good source of extraction but we can extract DNA from immature RBCs.
What is one example of a place where naturally occurring extreme temperatures provide the energy needed to bring hydrogen nuclei together in a fusion reaction?
One example of a place where naturally occurring extreme temperatures provide the energy for fusion reaction is in the core of the sun. The intense heat and pressure in the sun's core cause hydrogen nuclei to collide and merge, forming helium and releasing large amounts of energy in the process.
Is energy saved if we recycle metals?
Yes, you save all the energy that would have been needed to mine fresh ore from the ground and to extract the metal from that ore. The amount of energy needed to collect and sort the recycled metals is insignificant compared to this (especially for metals like aluminum that are very hard to extract from their ores).You only need to use the energy needed to melt the pure metal, which you would have needed anyway after extraction of new metal from fresh ore.
Why is it important to recycle metals that you extract by electrolysis?
It takes a lot of electric power to refine metals by electrolysis. Such metals therefore are a kind of stored energy. If they are not recycled, that energy is lost, and more energy will be needed to refine more metals by electrolysis to replace them. High energy consumption is a major factor in environmental pollution.
Are metals oxidants ot reductants?
metals generally acts as reductants because a relatively small amount of energy is needed to remove the small number of outer-shell electrons in metals.
What are the three conditions needed for life?
The three conditions needed for life as we know it are: liquid water, a source of energy, and a stable environment with suitable temperatures.
Which are the major Industries in great Britain?
Besides agriculture, you can imagine that Great Britain were into ship building and they needed energy so they had coal mining efforts and they also needed iron (iron ore extraction) to build tools and hardware.
Where on the most reactive metals on the periodic table?
the bottom of the Periodic Table. why? a metal looses electrons and at the bottom of the periodic table is the lowest amount of ionization energy (the energy needed to remove electrons) with low ionization energy, not much energy is needed to remove those electrons making it faster and easier to do so.
Why are so few metals extracted from sea water?
Most metals are not in any economic concentrations in seawater. The only exceptions are sodium and magnesium. A company did start up trying to extract lithium from seawater but it went bust but the technology will certainly be looked at again when lithium is needed in large amounts for making batteries. Bioengineering technology may be used in the future to get bacteria and algae to concentrate metals from seawater.
Why are high temperatures needed for fusion reactions to occur but not fission reactions to occur?
In fusion reactions, nuclei need to overcome the strong electromagnetic repulsion to merge and release energy, requiring high temperatures to achieve the necessary kinetic energy. In fission reactions, nuclei need to be bombarded by neutrons to induce a split, a process that can occur at lower temperatures.
How does a catalyst speed a reaction at low temperatures?
Catalysts will lower the activation energy needed for a certain reaction to happen. For example in the extraction of Aluminium from Bauxite (Aluminium Oxide) The melting point of Al2O3 is about 2000oC. But with the catalyst Cryolite (Na3AlF6), the overall melting point is lowered to about 950oC,
Are enzymes used in a chemical reaction?
Yes. Enzymes lower the activation energy needed to start a chemical reaction so that they can occur at temperatures safe for the organism.
What packaging material consumes the most energy to produce?
Plastic packaging consumes the most energy to produce, mainly due to the extraction and processing of fossil fuels needed to create plastic resin. The production of plastic also requires high-energy processes such as heating and molding that contribute to its greater energy consumption compared to other packaging materials.
Why are high temperatures needed to crack alkanes?
High temperatures are needed to crack alkanes because it provides the necessary activation energy for the breaking of strong carbon-carbon bonds. These bonds are quite stable, so elevated temperatures are required to overcome their energy barrier and initiate the cracking process.
