Burning a candle is a chemical change. It cannot be "unburnt"
I believe there is no chemical equation for this. this is because though the wick burning has a chemical reaction, the wax melting, making the candle shorter, is not undergoing a chemical reaction. simply a short change of state. If you were referring to the wick brurning though, this would be a combustion reaction. hope that helps.
Sharpening a pencil is a physical change because it does not alter the chemical composition of the pencil. The act of sharpening simply removes material from the pencil, making it shorter in length.
The shorter and easier way to show chemical reactions using symbols instead of words is called a chemical equation.
Yes, in general, shorter chemical bond lengths indicate stronger bonds. This is based on the principle that the closer the nuclei of two atoms are to each other, the stronger the attraction between them, resulting in a shorter bond length.
the burning of a wax candle is quite a slow change, i can take hours until a candle burns out. When you compare this to some chemical reactions that take a few seconds to go to completion then this is a relatively slow change
I believe there is no chemical equation for this. this is because though the wick burning has a chemical reaction, the wax melting, making the candle shorter, is not undergoing a chemical reaction. simply a short change of state. If you were referring to the wick brurning though, this would be a combustion reaction. hope that helps.
Sharpening a pencil is a physical change because it does not alter the chemical composition of the pencil. The act of sharpening simply removes material from the pencil, making it shorter in length.
The shorter and easier way to show chemical reactions using symbols instead of words is called a chemical equation.
Because they are shorter.
a trombone?
Yes, in general, shorter chemical bond lengths indicate stronger bonds. This is based on the principle that the closer the nuclei of two atoms are to each other, the stronger the attraction between them, resulting in a shorter bond length.
mid night
the burning of a wax candle is quite a slow change, i can take hours until a candle burns out. When you compare this to some chemical reactions that take a few seconds to go to completion then this is a relatively slow change
because of L_ _ _ _ _ _ _E
Because you touch yourself at night
In 2009, the days would start getting shorter after the summer solstice, which occurs around June 21st. This is because the amount of daylight gradually decreases as the Earth's axial tilt leads to shorter days in the Northern Hemisphere.
it means getting shorter or longer.