Rust on a nail is a chemical change.
Ice melting IS a physical change. Ice is made of water, when you melt ice its still water. Just in a different physical state.
T<span>he name of the compound that goes with the chemical formula of MgCl2 is D. magnesium chloride.
Mg is magnesium, and Cl is chlorine, and when it has 2 atoms, it become chloride.
Fluorite is F2, which is why A is incorrect, and B and C are incorrect because manganese is Mn, and molybdenum is Mo.
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Window cleaner is ammonia dissolved in water. This is an example of a _______.
Answer:
It reduces the amount of thermal energy that is transferred from outside to inside the container.
Explanation:
Remember that thermal energy = heat. Also foam cannot remove thermal energy, it is an insulator meaning it prevents the transfer of thermal energy.
First choice: Foam cannot just remove thermal energy
Second: Again foam does not remove energy
Third: This would mean the heat would continue to stay in the container, leading to the frozen foods melting
Fourth: Correct, it reduces the amount of outside heat from entering the container, thus preventing melting
About 1 part of a billion. I looked it up.