0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What is a substance formed in a chemical reaction?
a substance that is formed in a chemical reaction is called a product=)After a chemical reaction, new chemicals are formed. For an example:-NaOH + HCl = NaCl + HOH(H2O)Chemical substances are formed in chemical reactions.
How does burning become a chemical change?
Burning is a chemical change as when we burn anything eg paper a new substance is formed known as ashes. Therefore when a new substance forms it is known as chemical change. By Annika Khullar
If you are burning coal be a physical or chemical change?
chemical. A chemical change is a change where a substance is changed and a new substance is formed. in the case of coal when the solid carbon in the coal combines with the oxygen in the air carbon dioxide (CO2) is formed.
Is wood turning into ash in a fire a physical change?
physical--no, it's chemical because a new substance is formed by burning logs/paper, and the new substance, ashes has a different chemical composition.
What new materials are formed when a candle burns?
water,carbon dioxide and soot
What is a substance formed in a chemical reaction?
a substance that is formed in a chemical reaction is called a product=)After a chemical reaction, new chemicals are formed. For an example:-NaOH + HCl = NaCl + HOH(H2O)Chemical substances are formed in chemical reactions.
Is burning ammonium dichromate a chemical or a physical change?
chemical because a new substance is formed
Draw a burning candle and mark there is a reversible reaction?
Burning a candle is a chemical reaction. This chemical change is irreversible:So you'll never get a candle back by puting carbon dioxide and water together and put some light and heat (flame energy) back into it. You can't reverse 'the movie'The easiest way to tell if something is a chemical reaction is if heat or light are given of, a new substance is formed, or a colour change happens.
Is a candle burns chemical reaction?
Yes, burning a candle is a chemical reaction. The easiest way to tell if something is a chemical reaction is if heat or light are given of, a new substance is formed, or a colour change happens. Chemical changes are irreversible.Yes, whenever a candle burns, it is a combustion reaction between the carbon compounds of the wick and wax of the candle and of oxygen in the air. These compounds burn to create carbon dioxide and water, and also a few smaller carbon compounds, which is evident as the smoke rising occasionally from the flame. The flame you see and the heat you feel rising off of the burning wick is the evidence of an exothermic chemical reaction.Yes, burning a candle is a chemical reaction. The easiest way to tell if something is a chemical reaction is if heat or light are given of, a new substance is formed, or a colour change happens. Chemical changes are irreversible.
How does burning become a chemical change?
Burning is a chemical change as when we burn anything eg paper a new substance is formed known as ashes. Therefore when a new substance forms it is known as chemical change. By Annika Khullar
If you are burning coal be a physical or chemical change?
chemical. A chemical change is a change where a substance is changed and a new substance is formed. in the case of coal when the solid carbon in the coal combines with the oxygen in the air carbon dioxide (CO2) is formed.
Why are metal alloys an example of a physical change and not a chemical change?
They are a physical change because it is not like burning where a new substance is being formed.
When a physical changes occurs new substance are formed?
A new substance is formed only after a chemical change.
Is wood turning into ash in a fire a physical change?
physical--no, it's chemical because a new substance is formed by burning logs/paper, and the new substance, ashes has a different chemical composition.
Is a candle burning chemical change?
Yes, burning a candle is a chemical change. New chemical compounds are being formed as the reaction continues. The paraffin in the candle is a hydrocarbon chain, and it is "breaking down" chemically using oxygen from the air to form (idealy) carbon dioxide and water. But there are also physical changes that take place at the same time. Phenomena during the candle burning: - melting (physical phenomenon) - evaporation (may be considered a chemical but also a physical phenomenon) - oxydation - reaction with oxygen, burning (chemical phenomenon) - thermal decomposition (chemical phenomenon)
Which of the followings forms a new substance?
Which of the following forms a new substance?
What is a physical reactions?
Answer:A physical reaction is a reaction whereby a new substance is not formed and is reversible.For example,folding of paper. Unlike a physical reaction,a chemical reaction is a process whereby a new substance is formed and is not reversible.For example,burning of paper.
