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The molecules bond with other molecules or separate from other molecules of other substances, so that substance is now present or isn't present anymore. One example of a chemical change is sodium and chlorine into sodium chloride, or NaCl, or salt. Sodium and Chlorine are both toxic, but combined, they make something really good on fries. :) Chemical changes don't allow the original substances to keep their original properties. Another example is H2O, or water. It's made of two gases but is a liquid because of the chemical change it went through to become water.
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A change in which one or more substances combine or break apart to form new substances?
chemical change
When substances are mixed it can result in physical or a chemical change true or false?
true
Is it true that if a physical change that occurs when a substance changes composition by forming one or more new substances?
No. That is a chemical change. In a physical change, their is no change in chemical composition forming one or more new substances.
A substance that undergoes a chemical change is still the same substance after the change?
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What is true regarding the decomposition process?
Decomposition is a chemical change because the organism is broken down into new substances
Is a new substances must form is true about chemical reaction?
Yes, after a chemical reaction new substances are formed.
The chemical substances that an organism requires to live are called nutrients?
True
Are Table sugar and table salt are pure substances true or false?
it is not true it is a chemical reaction
Is it true that a physical change and a chemical are exactly alike?
Not true, they are not similar; a chemical change is a change in the molecule, the physical change is not.
Heating a chemical compound produces elements?
it's sometimes true
Is A chemical reaction occurs when a solution is formed true or false?
A substance changing state (i.e. solid to a liquid) is not a chemical change as the composition of the substance has not changed at all. The particles' energy and distance from each other is the only thing that is altered.
A chemical reaction causes a chemical change true or false?
It is true that a chemical reaction causes a chemical change. An example of this can be seen by adding baking soda to vinegar.
