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What is a physical combination of two or more substances that does not make a new substance?
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Is it a physical change or a chemical change when substances combine to make new substances with new properties?
Chemical change.
What is a synthesis?
Synthesis is a reaction in which 2 or more substances combine to make a more complex substance.
Why is mixture not a substance?
this is because the melecular chemicles in the substances mix and make a very dangerous gas (dont try this at home) a substance is smaller than a mixture because many things together make gasses which take p space too u know
What distinguishes a mixture form an impure substance?
If a substance in a mixture is preponderant--, if the amount far exceeds the amounts of the other substances in the mixture it is usually called an impure substance. Resource: Separation of the Components of a Mixture Lab -Chemistry
Do atoms and their combination make up all the substances in the world?
yes.
Can you make a sentence with mixture and physical change?
A mixture is a mix of substances such as blood or juice, physical changes only alter the form of the object not the substance itself.
When a substance undergoes a physical change what does not a change?
The chemical make up of a substance does not change. It must remain the same combination of atoms or molecules to be considered only a physical change.
A combination reaction occurs when one reactant forms two or more products.?
The correct answer in apex is TRUE!
What is the substance used in chemistry?
Substances are used to make chemical reactions.
What is the difference between pure and impure substances?
a pure substance is one which only contains one type of atom/molecule and an impure substance is one the has numerous types of atoms/molecules, but the impurites generally dont amount to over 50% of the substance's mass.
Is it a physical change or a chemical change when substances combine to make new substances with new properties?
Chemical change.
What substances make sheetrock?
Gypsum or 'calcium sulfate dihydrate' is the only substance used.
What is a physically combined pure substance?
Pure substances that are physically combined make a mixture.
What 2 substances make gold?
Gold is an element. It is made of only one 'substance'.
Does a physical change make the substance that undergoes it a different substance if not then what can change?
After a physical change a substance does not change its chemical composition it simply changes its state as, water to ice or vapours.
Is the glowing of a platinum wire in a flame a physical or chemical change?
It is a physical change. A physical change involves changing a substance only in its appearance, smell, taste, feel, or sound. A chemical change involves changing what makes up the substance or the way the substance reacts with other substances. When a normal platinum wire is placed over a flame, it glows. This is a physical change because the things that make up the platinum have not been changed, but the appearance has changed.
What are the Chemical and physical properties of substances used to make water bottles?
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