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A gas lawn mower is a lawn mower which is powered by gasoline.
Lawn mowers are available as electrically powered or gas powered. For an electrically powered mower, the question gets a bit messy. Sure the mower itself is using electricity, but then there's the question where that electricity is coming from. Might be solar, nuclear, hydro, wind or even chemical energy that was used to generate the electricity. For a gas powered mower, it's easier - that's chemical energy. There are also the human-powered, hand-pushed mowers. They would be powered by humans, which are powered by chemical energy. Stored Energy (Electricity, Petrol) to Kinetic Energy (Movement) with the by-product of heat energy.
If you use gasoline of any grade in a gasoline powered mower, it will be fine. I often use mixed gas for my 2 stroke chain saw in my 4 stroke mower with no ill effects other than some additional smoke and smell. If you put diesel in a gasoline mower, that is bad and could ruin the engine If you put gas in a diesel mower you will immediately ruin the high pressure injection system.
Answer The burning of gasoline is a chemical change.
Any burning is a chemical change. When gasoline (mostly a hydrocarbon called octane) burns, or combusts, it reacts with oxygen in the air to produce water vapor, carbon dioxide, and a bunch of heat energy, which your lawn mower engine harnesses to do work (turn the blade.)
Because the internal combustion technology was easily transferrred into all those businesses. Even airplanes!
There are is a 18'' gasoline lawn mower at Wal-Mart for less than $100.
A Radio Documentary report, about 1995, stated that 20 percent of America's CO2 emissions are Sourced from gasoline powered lawn mowers.
never
That will vary for each make and model of mower.
1958
No