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When silver coins are found in ancient shipwreck's they are coated with a black crust What question could you decide whether the silver underwent a chemical or physical change?
You would need to know if the silver underwent change that left the silver as it was originally, (in this case, having a black substance attach to it) or a change that made the silver into a new substance (like tarnishing). If the silver is still the same before and after the change, it was a physical change. If the substance is changed into a different substance after the change, it is a chemical change.
Is dissolving salt in water a a chemical change or a physical change?
It is a physical change as it can be "undone" by evaporating the water. An simple example of a chemical change is baking a cake, you can't un-bake a cake. To work out whether it is a chemical or physical change just think whether it can be undone or not.
What are the two criteria for whether a change is chemical or physical?
Oxygen and hydrogen
How do you determine weather a property is physical or chemical?
To determine whether a property is physical or chemical, consider whether the property can be observed or measured without changing the substance's identity. Physical properties, such as color, melting point, and density, can be observed without altering the material. In contrast, chemical properties, like reactivity and flammability, describe how a substance interacts with other substances and involve a change in chemical composition. If a property involves a change in identity or formation of new substances, it's chemical; if not, it's physical.
How you would separate the components of a mixture and state whether your methods would be physical or chemical changes?
l,
When silver coins are found in ancient shipwreck's they are coated with a black crust What question could you decide whether the silver underwent a chemical or physical change?
You would need to know if the silver underwent change that left the silver as it was originally, (in this case, having a black substance attach to it) or a change that made the silver into a new substance (like tarnishing). If the silver is still the same before and after the change, it was a physical change. If the substance is changed into a different substance after the change, it is a chemical change.
What is the most important question to ask determine whether a change is a physical or chemical change?
did the composition change
Is gas physical or chemical at room temp?
This question makes no sense. All substances, whether solid, liquid, or gas have both physical and chemical properties at virtually all temperatures.
Is dissolving salt in water a a chemical change or a physical change?
It is a physical change as it can be "undone" by evaporating the water. An simple example of a chemical change is baking a cake, you can't un-bake a cake. To work out whether it is a chemical or physical change just think whether it can be undone or not.
What are the two criteria for whether a change is chemical or physical?
Oxygen and hydrogen
What is the most important quiestion to ask to determine whether a change is physical or chemical?
The most important question to ask is whether the change results in a new substance being formed. Physical changes involve a change in appearance, state, or size of a substance without forming a new substance. Chemical changes involve a reaction that results in the formation of new substances with different chemical properties.
What would be a rule deciding whether a change is chemical or physical?
- A physical change is a change of phase or dimensions. - A chemical change is a change of the chemical structure, new molecules are formed, the initial molecule is transformed.
How do you decide whether an observed property of matter is a physical property?
If the property can be observed without changing the chemical composition of the substance, then it is a physical property. If the property can be observed only through a chemical reaction, then it is a chemical property.
Is rain evaporation physical or chemical?
Physical change from liquid to vapour. The water remains chemically the same whether liquid or vapour.
Is mercury liquid at room temperature physical or chemical?
Mercury metal is a liquid at room temperature. By visually determining the physical state of a substance does not produce a new substance. So if the mercury is a liquid that means it underwent a physical change because nothing was added.
Is mixing oil and water a chemical change?
Oil floating on water is not a "change", so asking whether it's a physical change or a chemical one is nonsense. To the extent there's any meaning at all to the question, it's a phenomenon caused by the physical properties of the two materials.
How you would separate the components of a mixture and state whether your methods would be physical or chemical changes?
l,
