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What else can I help you with?
Is salt dissolving in a glass of water a chmical change?
A chemical change is when a substance is formed into an entirely new substance, with different properties, as such, a chemical change cannot be reversed. So in answer to your question, salt, in this case the solute (the substance that is being dissolved), is dissolved into water, a solvent (the substance that a solute is dissolved into), so you would think that a chemical change has taken place. But actually, a physical change (when something is changed, but keeps its properties, for example, when you break chalk in two, it is still chalk, only smaller), because if you heat the saltwater, then the water will evaporate, leaving the salt behind, in its original form.
Does the iron in the mixture have the same or different properties to the element iron?
Iron keeps its unchanged chemical properties, but in a mixture it might add new, mostly physical properties to the alloy, this is also true for the other elements in the mixture, eg. C or Ni, or Cr in steel alloys.
What keeps cells contents separated from external environment?
Cell contents are separated from the external environment by the cell membrane. Cells are also separated by the external environment when they are in the bloodstream in the capillaries and veins.
A chemical that keeps food from spoiling is a example of?
it is an example of a inhibitor
What else keeps the sun's gases in motion?
Chemical reactions
What is the smallest unit of matter that exists by itself and keeps all of the chemical properties of a substance?
Molecules
Is an atom a piece of an element?
atom - smallest piece of an element that keeps its chemical properties; compound - substance that can be broken into elements by chemical reactions
Is it true a chemical equation must always be balanced because matter keeps its original properties?
Yes.
What is the diffeference between a physical and a chemical change?
A physical change is when a substance changes, but still keeps its identity. When a chemical change occurs, the substance changes its identity.
What is it called when there is no chemical change each keeps its own property's and it can be changed?
atom
Each substance in a mixture of iron and sulfur keeps its own?
properties and can be separated through physical means based on their differences in properties such as magnetism, solubility, and boiling point. Iron and sulfur can be physically separated by using a magnet to remove the iron, or by dissolving the mixture in a suitable solvent to separate the components.
Is salt dissolving in a glass of water a chmical change?
A chemical change is when a substance is formed into an entirely new substance, with different properties, as such, a chemical change cannot be reversed. So in answer to your question, salt, in this case the solute (the substance that is being dissolved), is dissolved into water, a solvent (the substance that a solute is dissolved into), so you would think that a chemical change has taken place. But actually, a physical change (when something is changed, but keeps its properties, for example, when you break chalk in two, it is still chalk, only smaller), because if you heat the saltwater, then the water will evaporate, leaving the salt behind, in its original form.
What is the smallest unit that retains the unique chemical properties of that specific type of matter?
A molecule is the smallest unit of a pure substance that can exist and still retain its chemical properties. An atom is the smallest unit of an element that can exist and still retain its chemical properties.
What is the type of tissue that lines the body and keeps organs separated?
They are the epithelial tissues. They lines and covers body
How is evaporation considered to be a physical change and not a chemical change?
There is no electron rearrangement when a material evaporates, which is what defines a chemical change. Evaporation is the material's vapor pressure overcoming the particular force (Van der Waals, etc) that otherwise keeps it a liquid.
What is the smallest unit of substances that keeps all of the physical and chemical properties of that substance?
The atom or smaller, the amount of protons like helium always has 2 protons no matter what.
Explain why changes of state are considered physical transitions and not chemical processes?
Changes of state involve a rearrangement of molecules or atoms without altering their chemical composition. Physical transitions, such as melting or boiling, do not involve breaking or forming chemical bonds. Therefore, they are considered physical changes rather than chemical processes.
