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What identifies a chemical change has taken place?
Signs that a chemical change has taken place include the formation of a gas, the formation of a precipitate, a change in temperature, and a change in color.
When a cube of ice melts to form a puddle of water is it a physical change?
Yes. No chemical change has taken place, only a physical change. It can be undone (liquid water can be re-frozen)
Is slicing turkey a physical or a chemical?
Slicing turkey represents a physical change, not a chemical change. The chemical composition of the sliced turkey is identical to the chemical composition of the intact turkey. Only a physical change has taken place.
What are 3 ways you know a chemical change has taken place?
Three signs of a chemical reaction include the release or absorption of heat, a change in color, and the creation of a gas or a precipitate.
Which in the following events is not a common sign that a chemical change taken place?
For example melting, boiling, evaporation, transformation in powder are not signs of a chemical reaction.
What signs that a physical change has taken place in water?
hydrogen and oxygen gas are given off
What identifies a chemical change has taken place?
Signs that a chemical change has taken place include the formation of a gas, the formation of a precipitate, a change in temperature, and a change in color.
When liquid water evaporates which has taken place molecular change or chemical change?
Physical change.
What is making salt water to gargle for a sore throat a physical or chemical change?
Physical. It is a mixture of salt and water. No chemical change has taken place.
When a cube of ice melts to form a puddle of water is it a physical change?
Yes. No chemical change has taken place, only a physical change. It can be undone (liquid water can be re-frozen)
Is slicing turkey a physical or a chemical?
Slicing turkey represents a physical change, not a chemical change. The chemical composition of the sliced turkey is identical to the chemical composition of the intact turkey. Only a physical change has taken place.
When paper turns yellow brown upon exposure to sunlight what type of change has taken place a chemical or physical change?
A chemical change has taken place. The exposure to sunlight causes the paper to undergo a chemical reaction, breaking down the molecules in the paper and causing the color change to occur.
What are 3 ways you know a chemical change has taken place?
Three signs of a chemical reaction include the release or absorption of heat, a change in color, and the creation of a gas or a precipitate.
How do you know when a physical change has taken?
In a physical change, the substance's chemical properties remain the same even though its appearance or state may have changed. Signs of a physical change can include changes in shape, size, or phase (solid, liquid, gas) without altering the chemical composition of the substance.
What changes gives NO evidence that a chemical reaction has taken place?
Changes such as a change in state (solid to liquid), change in color, change in odor, change in solubility, or change in temperature do not provide direct evidence that a chemical reaction has occurred. These changes can be indicative of a physical change rather than a chemical change. To confirm a chemical reaction, additional evidence such as the formation of new substances, evolution of gas, or consumption of reactants is necessary.
Which in the following events is not a common sign that a chemical change taken place?
For example melting, boiling, evaporation, transformation in powder are not signs of a chemical reaction.
What suggests that a physical change has taken place in a ice cube?
A physical change in an ice cube can be suggested by observing a change in its shape, size, or phase. For example, if an ice cube melts into water or is crushed into smaller pieces, it indicates a physical change has occurred.
