Carbonic acid is a weak acid that is created when carbon dioxide (CO 2) is dissolved in water (H 2 O), resulting in the chemical formula H 2 CO 3. When the acid dissociates, or gives up a hydrogen ion, the resulting molecule is called a bicarbonate ion.Carbonic acid appears frequently in the natural world.It can be found in sodas, champagne, and blood. The acid even appears in rain. During the making of soda, carbon dioxide is dissolved in water.hen the acid dissociates, or gives up a hydrogen ion, the resulting molecule is called a bicarbonate ion. Carbonic acid appears frequently in the natural world. It can be found in sodas, champagne, and blood. The acid even appears in rain. During the making of soda, carbon dioxide is dissolved in water.
Australian money consists of banknotes and coins. Australian banknotes (called bills in countries such as the USA) are made of plastic in a manufacturing process pioneered in Australia. They come in denominations of $100, $50, $20, $10 and $5.
It is subdivided into 100 cents. As of 2011, the Australian is the 5th most traded currency in the world, accounting for 7.6% of the world's daily share. It trades in the world foreign exchange markets behind the US dollar, the euro, the yen and the pound sterling.he exchange rate was pegged to the pound sterling at a rate of $1 = 8 shillings ($2.50 = UK Â£1). In 1967, Australia effectively left the sterling area, when the pound sterling was devalued against the US dollar and the Australian dollar did not follow.