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How do you explain that a chemical reaction occured?
A chemical reaction occurs when reactants undergo a transformation to form new substances, which is evidenced by observable changes such as color change, gas production, temperature change, or the formation of a precipitate. The breaking and forming of chemical bonds between atoms result in this transformation. Additionally, energy is often absorbed or released during the process, indicating a change in the system. These signs collectively confirm that a chemical reaction has taken place.
What are three signs that a chemical change has occured?
chemical change doesn't apper outside easily as it is change in the chemical property of the element or the experiment done,specific methods can only be used to detect the chemical change for the substance under observation.
When substances are different from the starting substances what occured?
This is a chemical reaction.
What heat gas production and color change can all be evidence of chemical change.?
- A gas is evolved from reactants only if a chemical reaction occured.- The same situation for the color change.These are very possible signs but they are not absolute; many other factors must be studied.
What happens in a can of spoiled food as gas is produced?
A chemical reaction of food decomposition occured.
When a substance changes into a difference substance a what change has occured?
chemical change
What can be evidence of a chemical reaction?
Evidence of a chemical reaction can include formation of a gas, color change, temperature change, formation of a precipitate, or production of light. These observable changes indicate a transformation of substances into new molecules with different properties.
When a substance changes into a different substance what change has occured?
Reactants form product(s) during a chemical reactions, generally by oxidation, reduction, hydrolysis, or chemical bonding.
When a substance changes into a different substance a change has occured?
Reactants form product(s) during a chemical reactions, generally by oxidation, reduction, hydrolysis, or chemical bonding.
What type of reaction has occured when two or more substances combine to form another substance?
This is called synthesis, a combination chemical reaction that changes the chemical bonds in the substances.
What are the five clues that suggests a chemical reaction is taking place?
first when there's a physical change in the substance second there will be a solution or a formula to that substance third is, it involves temperature fourth is change in color of the substance fifth is the bubbling of another substance is yet an another clue that a chemical reaction has occured.
What are 2 types of evidence that suggest that evolution has occured?
Accept fossil evidence, anatomical evidence, molecular evidence
How do you explain that a chemical reaction occured?
A chemical reaction occurs when reactants undergo a transformation to form new substances, which is evidenced by observable changes such as color change, gas production, temperature change, or the formation of a precipitate. The breaking and forming of chemical bonds between atoms result in this transformation. Additionally, energy is often absorbed or released during the process, indicating a change in the system. These signs collectively confirm that a chemical reaction has taken place.
Which observation does not indicate that a chemical reaction has occured?
A change in state, such as boiling or melting, does not always indicate a chemical reaction has occurred. It could be a physical change.
What are three clues that a chemical change has occured?
Three clues that a chemical change has occurred:Color changesa precipitate formsa gas forms
What is contemporary evidence?
Evidence that existed or occured within the selected time frame you're looking at.
What are three signs that a chemical change has occured?
chemical change doesn't apper outside easily as it is change in the chemical property of the element or the experiment done,specific methods can only be used to detect the chemical change for the substance under observation.
