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Who discovered oxygen?

“Oxygen was discovered independently by Carl Wilhelm Scheele and Joseph Priestley in the 1770s, and Antoine Lavoisier named it.”

Reference: Royal Society of Chemistry

What saturation of sulfur dioxide will cause people to cough

Sulfur dioxide is a colorless gas with a suffocating, choking odor. It is toxic to humans and concentrations as low as 8 ppm will produce coughing. Incredibly, in the Odyssey, Homer describes the burning of sulfur (formation of SO2) as a way that homes were 'fumigated'.

How much of the air is oxygen?

About 21% of Earth's air is oxygen.

How did the Louisiana Purchase change the size of the US?

In 1803 the US bought the Louisiana Territory from France for about $15 million. The deal roughly doubled the size of the country.

Another fact

“Oxygen was discovered independently by Carl Wilhelm Scheele and Joseph Priestley in the 1770s, and Antoine Lavoisier named it.”

More from this shelf

What saturation of sulfur dioxide will cause people to cough

How much of the air is oxygen?

How did the Louisiana Purchase change the size of the US?