About 1 pint (480 mL) of blood is taken when you donate. It takes about 10 minutes. The whole process-including answering questions and having a short exam-takes up to an hour. Donated blood is tested to make sure that it is safe to use.
Soda is an unhealthy beverage because it's high in calories and sugar but low in vitamins and minerals. Coca-Cola is one example of a type of soda that's sugary and packed with calories, but Coke Zero is one alternative that is sugar-free.
Coca-Cola is 0.055% phosphoric acid (this contributes to the zingy taste and fizziness). The phosphoric acid in Coke removes the oxide coat on the pennies, thereby leaving the metal shiny.Remember though that you should NEVER try to clean a collectible coin.o when calcium and zinc build up on your penny soaking it in coke will eat away at the metals built up, leaving it nice and shiny. Side note: alkaline pH substances eat away at proteins so that's why we use high alkaline products to clean our sinks and toilets.