Tampilkan postingan dengan label senyawa kimia. Tampilkan semua postingan
Tampilkan postingan dengan label senyawa kimia. Tampilkan semua postingan
Selasa, 08 Februari 2011 | 18.11 | 8 Comments

LED Lights for Your Teeth

Having a tooth with colorful rays? Why not? This is not something that is impossible for young children in Tokyo, Japan. Currently, they have one more alternative to the trend (if it can be spelled like that) to support their appearance: the LED lights on Their teeth!

This time, turn to pull teeth to get an accessory that makes your teeth to shine with a wide range of colors! If you imagine a kind of tool or dental braces fake diamonds and gold, you are wrong! Accessory is meant here is a tool that can make a tooth out bright light and would be very striking when used in a dark room or night.

Ray was none other does not come from the LED is placed in the mouth. The tool is shaped like a tool used by boxers to coat the teeth during the game. These rays can be changed its color by connecting the LED to the computer device. In addition to the color set, users can also adjust the intensity of light flicker. Not enough? This tool will also be "meramainkan" mukut users because of noise "buzz", create the user as if like she was hiding a bee in her mouth.

Motoi Ishibashi and Daito Manabe is the originator and creator of this tool. Motoi explained that he was inspired by a video about sticking to the magnetic rays. He also developed his idea to create a tool that can make your teeth shine with the use of LED light.

Technology unusual-and certainly not very comfortable for the mouth-it became popular among Japanese teenagers. In fact, the tool is used in a department store for their advertisement. Apparently, the Japanese have always been the leading country in terms of finding a variety of unique tools that have never previously imagined. Are you interested to "illuminate" your teeth?

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Senin, 05 April 2010 | 16.38 | 1 Comments

RUMUS KIMIA


Kita telah membahas senyawa kimia, baik dari sisi lambang senyawa kimia, sampai dengan komposisi massa dari unsur penyusunnya yang selalu tetap. Lambang senyawa kimia HNO3, P2O5 dan H2O adalah rumus kimia suatu zat.

Rumus kimia menyatakan jenis dan jumlah relatif unsur atau atom yang menyusun suatu zat, dengan kata lain rumus kimia memberikan informasi tentang jenis unsur dan jumlah atau perbandingan atom-atom unsure penyusun zat.

Penulisan rumus kimia dilakukan dengan menyatakan lambang unsur dan angka indeks. Lambang unsur menunjukkan jenis unsur dan angka indeks menyatakan jumlah unsur yang menyusun senyawa tersebut. Untuk itu kita ambil contoh rumus kimia untuk asam sulfat yaitu H2SO4. Dari rumus kimia ini kita dapatkan informasi :

  1. Unsur penyusunnya adalah Hidrogen (H), Sulfur (S), dan Oksigen.
  2. Banyak unsur penyusun asam sulfat adalah; 2 unsur H, 1 unsur S dan 4 unsur O.
  3. Jika hanya terdapat satu unsur, maka indeks tidak perlu dituliskan.

Contoh lain pengertian dari rumus kimia disajikan pada Gambar berikut.

rumus kimia

Ditulis oleh Zulfikar di http://www.chem-is-try.org
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