What kind of gas is used for gas stoves?

DTSL questioned:

Yes we use gas for gas stoves, but what kind? We breath in oxygen gas, and we fill with air balloons with helium gas, but what type of gas is used for gas stoves? I just want the name.

How to find the volume of oxygen gas collected in water decomposed?

Smilely questioned:

When fill up is subjected to an gripping current, it decomposes to hydrogen and oxygen gas. If 1.00g of fill up is moldy at 1.00 atm and 25 top Celsius, what number of oxygen gas is collected?