BRAIN TEASERS
Brain Teasers User Profile

Simon Adanu Ogiji

rank
478
points
1
See full ranking list
short ranking list
476. Jadranka Petrinic 1
477. Gordon Bennett 1
478. Simon Adanu Ogiji 1
479. Tran Nguyen Quoc Khang 1
480. Nguyễn Tuấn 1
last 3 solved tasks
How many cubes are there?

Carl Wilhelm Scheele

Died 21 May 1786 at age 43 (born 9 Dec 1742). (also Karl) Swedish chemist who discovered oxygen in 1772. Scheele, a keen experimenter, worked in difficult and often hazardous conditions. In his only book, Chemical Observations and Experiments on Air and Fire (1777), he stated that the atmosphere is composed of two gases, one supporting combustion, which he named "fire air" (oxygen), and the other preventing it, which he named "vitiated air" (nitrogen). Due to delay in his publication, he lost priority to Priestley's discovery of oxygen in 1774. Scheele discovered many substances, such as chlorine (1774), manganese (1774), tungsten (1781), molybdenum (1782), glycerol, hydrocyanic (prussic) acid, citric acid, hydrogen sulphide and hydrogen fluoride. He also discovered a process resembling pasteurization.

People who wonder whether the glass is half empty or half full

People who wonder whether the glass is half empty or half full miss the point. The glass is refillable.
Jokes of the day - Daily updated jokes. New jokes every day.
Follow Brain Teasers on social networks
This site uses cookies to store information on your computer. Some are essential to help the site properly. Others give us insight into how the site is used and help us to optimize the user experience. See our privacy policy.