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Tolong kerjain dong ahli kimia nomor 3-6 mw dikumpul
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Tolong sekali ada tugas kimia disuruh translate artikel kimia dari inggris ke indonesia.tolong di bantu yang pandai bahasa inggris Oxidizing Agent in The Body Oxidation-reductions are used all the time. Burning, bleaching, batteries, metallurgy, and photography all rely on oxidation-reduction reactions. An important application of oxidation-reduction reactions is in electrochemical cells. (These types of cells should not be confused with biological cells. The word cell comes from cella, Latin for chamber or small room.) In an electrochemical cell, the oxidation reaction is physically separated from the reduction reaction, and the electrons pass between the two reactions through a conductor. Oxidation occurs at the anode and reduction occurs at the cathode. Oxidation-reduction reactions are responsible for food spoilage. The main source of oxidation is oxygen from the air. Preservatives that are added to foods are often reducing agents. Oxidation reactions are important in many reactions that keep our bodies going. But oxidation has also been blamed for aging, cancer, hardening of the arteries, and rheumatoid arthritis. Research is being done to evaluate the benefits of antioxidants in foods and dietary supplements. Antioxidants are natural reducing agents, such as fat soluble vitamin E and vitamin C (ascorbic acid). These substances might inhibit damaging byproducts of oxidation reactions that can occur in the human body after exposure to some toxic chemicals. One concern that scientists studying antioxidants have is that substances do not always act the same way in the human body that they do outside of it. For example, vitamin C is a reducing agent. If lemon juice is squirted on a cut apple, the vitamin C in the juice will prevent the browning of the apple that is caused by oxidation of the apple by the air. However, vitamin C might act as an oxidizing agent in the body.
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Tolong yang bisa dijawab.Apa itu daya heater,rumus daya heater dan hubunganya sama kalor.Soal:sebuah pemanas listrik memerlukan 15 menit untuk meningkatkan suhu 800 gram suatu cairan tertentu dari 300 K ke titik didihnya 424 K. dalam 3 menit kemudian, masa 155 gr cairan menguap. jika kalor jenis cairan adalah 4500 J/Kg K dan kehilangan kalor ke atmosfer dan wadah diabaikan, kalor laten uap cairan adalah..... A. 214 000 J/kg B. 327 000 j/kg C. 492 000 J/kg D. 576 000 J/kg E. 633 000 J/kg
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