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Does the composition of a substance always stay the same?
The composition of pure substances, such as elements and compounds, are always the same. The composition of mixtures can vary.
What always stays the same in a compound?
a compound always has the same chemical formula
Is water a physical or chemical change?
Water changing from liquid to solid (ice) or gas (steam) is a physical change, as the chemical composition of water remains the same. However, when water undergoes electrolysis to produce hydrogen and oxygen gas, it is a chemical change as the chemical composition of water is altered.
What is the definition of a definite chemical composition?
Definite chemical composition is when a mineral is made of the same material throughout. Basically when a mineral is only made of one material all the way through, not part iron in one part and then gold in the rest.
When water changes to steam is it a chemical change?
The change of water to steam is a physical change, not a chemical change. In this case, the water molecules are simply changing phase from a liquid to a gas, but the chemical composition of water remains the same.
In what ways are liquid water and vapor water the same?
They have the same chemical composition of H2O.
What characteristics of water remains the same no matter what is dissolve in it?
The chemical composition of water remain constant.
Does the composition of a substance always stay the same?
The composition of pure substances, such as elements and compounds, are always the same. The composition of mixtures can vary.
How do you know the water is evaporated from the water?
Water as a liquid and water as a gas (vapors) have the same chemical composition.
What always stays the same in a compound?
a compound always has the same chemical formula
What do water vapor and liquid water have in common?
They all have the same chemical composition, ie, they are all H2O.
What is shales chemical symbol?
It doesn't have one. Shale is a mixture and doesn't always have the same composition. Only elements have chemical symbols
When ice melts what happens to its chemical composition?
When ice melts, the chemical composition remains the same. Ice is just the solid state of water, so when it melts, it turns into liquid water. The molecules in ice rearrange themselves into a more disordered state to become liquid water, but the chemical makeup of the water molecules themselves does not change.
Is water a physical or chemical change?
Water changing from liquid to solid (ice) or gas (steam) is a physical change, as the chemical composition of water remains the same. However, when water undergoes electrolysis to produce hydrogen and oxygen gas, it is a chemical change as the chemical composition of water is altered.
What do water vapor ice and liquid water have in common?
They all have the same chemical composition, ie, they are all H2O.
What is the definition of a definite chemical composition?
Definite chemical composition is when a mineral is made of the same material throughout. Basically when a mineral is only made of one material all the way through, not part iron in one part and then gold in the rest.
Is a mixture always a chemical combining of substances?
Any particular isolated sample of a mixture has a definite chemical composition, but the general idea of a mixture, even of the same materials, implies variability in possible chemical composition.
