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The composition of pure substances, such as elements and compounds, are always the same. The composition of mixtures can vary.
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Why does the chemical composition of water always stay the same?
Because water is a compound, a type of pure substance, which has a definite composition.
What are the signs of physical change and chemical change?
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.
Do dynamic levels always stay the same for the entire piece?
No Apex!!
Why does the number of atoms and twist ties have to stay the same?
Atoms do not always contain the same number
Why must the number of protons always stay the same in an atom?
if the number of protons changed, the atom would become a different element
Why does the chemical composition of water always stay the same?
Because water is a compound, a type of pure substance, which has a definite composition.
Will density always stay the same no matter what size the object is?
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
What are the signs of physical change and chemical change?
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.
What happens if a substance of unknown composition is heated in a sealed container As a result the mass of the container and its contents?
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.
What is the relationship between the frequency of the wave source and the wave length of the waves?
The product of (frequency) times (wavelength) is always the same number,as long as the waves stay in the same substance. That number is the speedof the waves through the substance.
Do mountains always stay the same?
no
How can you decide if a reaction is a Chemical reaction?
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.
What factors in an experiment always stay the same?
k
Does the mass of an object always stay the same?
Yes
Why does voltage increase and not stay the same in mutual induction?
Well the same reason fire doesn't stay at the same temp. is always changing
Does you mass always stay the same no matter what?
Yes, no gas is given off, therefore the mass of conversation will stay the same.
Does the atmosphere always stay the same?
Weather does not stay the same because of weather patterns around the world.Hope it helped! XD
