The composition of pure substances, such as elements and compounds, are always the same. The composition of mixtures can vary.
The chemical composition of water, H2O, remains the same because it is a pure substance with a fixed ratio of hydrogen to oxygen atoms. Water molecules consist of two hydrogen atoms covalently bonded to one oxygen atom, and this arrangement is stable and does not change under normal conditions.
a compound always has the same chemical formula
In a physical change, the bonding between atoms remains intact. The change involves the rearrangement of atoms or molecules without breaking or forming new chemical bonds. This means the fundamental structure and composition of the substance remain the same.
Physical Change: A change in which the atoms or molecules in a substance stay the same. Example: Ripping a piece of paper in half Chemical Change: A change that affects the type of molecules or atoms in a substance. Example: Burning wood The primary difference is that in a physical change, the composition of the substance remains the same, but in a chemical change, the composition of the substance changes.
The total amount of matter in a substance remains the same after both chemical and physical changes. This is known as the Law of Conservation of Mass, which states that matter cannot be created or destroyed in a chemical reaction or physical change, only rearranged. So, the total mass of the substances before and after the change will be equal.
Density of the substance will always stay the same. Density of the object will also stay the same if solid, no matter the size, but not if it is carved out. That is why a steel boat can float
The chemical composition of water, H2O, remains the same because it is a pure substance with a fixed ratio of hydrogen to oxygen atoms. Water molecules consist of two hydrogen atoms covalently bonded to one oxygen atom, and this arrangement is stable and does not change under normal conditions.
The chemical composition of the matter will stay the same during a physical change. Only the physical properties, such as shape, size, or phase, will be altered without affecting the chemical composition of the substance.
a compound always has the same chemical formula
If a substance of unknown composition is heated in an open container will Its mass will stay the same as a result the mass of the container and its contents decreases. A substance of an unknown composition is heated in a sealed container the mass of the container and its content remains the same.
Yes
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Chemical change is when the composition of your elements or solution change. In a simple way to say it, it's when you no longer have the same elements or solution that you started with. You can determine if a reaction is chemical, by observing the chemical properties. Usually it's when there's a color change, a new substance formed, etc.. On the other hand, physical change is when the composition of your substance stay the same, but the physical properties change. For example, liquid water evaporate into H2O gas.
Well the same reason fire doesn't stay at the same temp. is always changing
Yes, no gas is given off, therefore the mass of conversation will stay the same.
Abby, names always stay the same
No, the atmosphere is constantly changing due to processes like evaporation, condensation, and air movement. Factors like weather patterns, human activities, and natural events can also influence the composition and behavior of the atmosphere.