What is the name of chemical compound denoted as CH4?
Methane is a chemical compound with the chemical formula CH4. It is a group-14 hydride and the simplest alkane, and is the main constituent of natural gas. The relative abundance of methane on Earth makes it an attractive fuel, though capturing and storing it poses challenges due to its gaseous state under normal conditions for temperature and pressure.
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What is written on the Saudi Arabia flag?
a praise of the king
a call to fight for the country
declaration of belief
The double-headed eagle serves as the Russian coat-of-arms. Where did it originate?
old Slavic symbol of good fortune
it was taken over from the Holy Roman Empire
it was taken over from the Byzantine Empire