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FAQ

Iron is extracted from iron oxide by displacement with carbon.But aluminum is not extracted from aluminium oxide using displacement by carbon. Suggest a reason for this.

Well, de facto because the heat of formation of aluminum oxide is so much greater than the heat of formation of iron oxide. If you're looking for something more mechanistic, find Al and Fe in the periodic table. Al and Fe are in different rows, and Fe is larger than Al, so although Al+3 and Fe+3 have the same charge, oxygen bonds less strongly to Fe+3 than to Al+3 because it's further away from the nucleus of Fe. Al+3 has no outer shell electrons at all; 3s, 3p, and 3d subshells are all empty. It's effectively a charged sphere with nothing to interfere with bonding. Fe+3 (as in hematite, Fe2O3) is larger, has filled 3s and 3p subshells, and a half-filled 3d subshell. That 3d electron density projects pretty far out into space, holding oxygen at arms length. Aluminum has no electron density in 3d orbitals, so oxygen can tuck in nice and tight and get a good grip. Any of these hit the mark? I don't know what background you're bringing to this question.

The weight of an aluminum sheet can vary depending on its thickness and dimensions.

Yes, aluminum sheet can be painted or coated after fabrication. Aluminum is a versatile material that can be easily painted or coated to enhance its appearance or provide additional protection. The process involves preparing the surface by cleaning and removing any contaminants, followed by applying a primer to improve adhesion. After the primer has dried, a topcoat of paint or coating can be applied to achieve the desired color or finish. The type of paint or coating used will depend on the intended use and the specific requirements of the application. Overall, painting or coating aluminum sheet after fabrication is a common practice and can greatly enhance its aesthetics and durability.

Yes, aluminum sheets can be used for sound barriers. Aluminum is a lightweight and durable material that can effectively block and absorb sound waves, making it an ideal choice for soundproofing applications. Aluminum sheets can be installed in various forms, such as solid panels or perforated sheets, to create effective sound barriers in residential, commercial, and industrial settings. The thickness and design of the aluminum sheets can be customized to meet specific soundproofing requirements. Additionally, aluminum is resistant to corrosion, making it suitable for outdoor applications where sound barriers may be exposed to harsh weather conditions. Overall, aluminum sheets provide a cost-effective and efficient solution for reducing noise levels and creating quieter environments.

I heard somewhere that when aluminum is heated, it releases something that is a known cause of Alzheimers. Is this true? I have a homemade cooker made of aluminum and I don't want Alzheimers.

Yes, it can, throw it away, aluminium in deodorant can also cause breast cancer, so use one that is aluminium free

The electrical conductivity of aluminum sheets is quite high, making aluminum one of the best conductors of electricity among common metals. It has a conductivity rating of approximately 37.7 x 10^6 siemens per meter (S/m). This high electrical conductivity makes aluminum a preferred choice for various electrical applications, such as wiring, power transmission lines, and electrical connectors.

Hi I am getting a laptop pretty soon and have pretty much decided on a Mac. But really a white macbook is $1150, and aluminum is $1400. And just so no one says this, the white one is updated with all the same hardware(Advanced graphics, etc.) I want to get it asap so the $250 would mean about 2 months longer which would kind of be a drag. I also understand the aluminum doesn't have a firewire port, but idk what the hell that even is so can someone explain what it is and why I would care about it. Basically, is it worth the 2 months and $250 for the aluminum. Thanks.

in case you'd be utilising it for surfing the internet and doing papers for college the macbook white will be proper for you. The aluminum macbook is an same pc, except aluminum with more advantageous efficient technical specs (more advantageous RAM, swifter processor etc.) this stuff gained't make a lot of a large difference in case you only plan to apply be conscious processor and the internet. The aluminum might want to be more advantageous efficient in case you watch extremely some video clips on youtube and such, the aluminum macbooks are not getting as warm as quickly because the plastic ones do. The macbook air is something so that you could only purchase for stylish applications, it has a lot less skill than both the macbook white and the macbook aluminum, for a larger value ticket simply by this is portability. wish this enables! i'm a contemporary consumer of a 2.4 macbook aluminum btw :)

Consider an aluminum wire of diameter 0.580 mm and length 28.0 m. The resistivity of aluminum at 20.0°C is 2.82 10-8 Ω · m.(a) Find the resistance of this wire at 20.0°C. ___________Ω(b) If a 9.00-V battery is connected across the ends of the wire, find the current in the wire. __________A

Aluminum has a resistivity of 2.65 x 10^-8. But I will use your figure of 2.82 x 10^-8. R = ρL/A where ρ = resistivity = 2.82 10-8 Ω · m, L = Length = 28 meters, A = Area =( .58mm/2)^2 x pi = 0.26 mm^2, or 2.6 x 10^-7 m^2 R= (2.82 x 10^-8)(28)/2.6 x 10^-7 = 3.03 ohms I=V/R = 9/3.03 = 2.97 amps