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When meat begins to smell after it sits in the hot sun for a few hours does it have a chemical reaction?
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Is picking up iron filings with a magnet a chemical reaction?
No, a chemical reaction is when the atoms are not mixed together but chemical bonded together. You know when a chemical reaction has happened when you can smell, hear or see things reacting.
What are the four occurrences indicate a chemical reaction has occurred?
A chemical reaction can result in any or all of the following: - a change in temperature (up or down) - a change in color - a smell that wasn't there before - the formation of bubbles (indicating the production of a gas) - the formation of a precipitate
Is souring milk a physical or chemical change Why or why not?
It's a chemical change. The smell is the giveaway; a smell that wasn't there before is often an indicator of a chemical change. Also, the rate at which the milk sours can be changed by heat. For example, milk in the refrigerator is actually undergoing this souring reaction at all times, but the lower temperature inside the refrigerator slows it down so that it takes many days. But if you leave it outside the refrigerator, it will sour much more quickly - in a matter of hours. An increase in heat, therefore, quickens the reaction rate. This would not be the case in a physical change.
Does gold have a smell?
No gold donot have any smell. The smell which comes is the smell of the reaction when coated in metals.
When burning a piece of wood what evidence is there to show that a chemical reaction had taken place?
- the wood disappear - the temperature is increasing - gases as carbon dioxide and water vapour are released
Which sign of a chemical reaction is not detectable by sight?
Smell
Why is it a sign of a chemical reaction if gas is given off?
It is sign of chemical reaction because smell and heat is produced.
Why do brussel sprouts smell when over cooked?
Chemical Reaction. The chemical sinigrin is released.
Is picking up iron filings with a magnet a chemical reaction?
No, a chemical reaction is when the atoms are not mixed together but chemical bonded together. You know when a chemical reaction has happened when you can smell, hear or see things reacting.
What is the most important sign that a chemical reaction is occuring?
The most important sign is when you smell an odor . when you began to smell and odor that is a automatic chemical change.
How can you observe chemical reaction?
you can observe chemical reactions from its smell, colour, shape, or the change in it's properties
How do you know when a chemical reaction happend?
you would be able to see or smell the change
What are the chemical reactions for converting salt to chlorine?
it begins to create a distinctive smell of a stink bomb :D
How do you determine whether a gas given off during a chemical reaction is oxygen or hydrogen?
Smell
What exactly is a chemical reaction?
A chemical reaction is what takes place when two or more opposing chemical come together and cause some sort of reaction, either positive or negative. An example would be mixing bleach and ammonia which will trigger a very noxious smell which can lead to serious illness.
Is the conversion of two compounds into a solution a chemical change?
Not necessarily. There's something called the enthalpy of mixing which can be responsible for lowering the temperature when two substances are mixed even if no chemical reaction occurs. It may also be an endothermic reaction; if there are other signs of a reaction (formation of a precipitate, evolution of a gas, color change, etc.) then it probably is a chemical reaction.
What identifies chemical properties?
To recognise a chemical reaction, you must look for a product, the result of the chemical reaction, the product of the reactants. You must also look for more obvious signs like, gas or an exothermic reactions.
