Pb(NO₃)₂(aq) + 2NaI(aq) → 2NaNO₃(aq) + PbI₂(s)
PbI₂ (the precipitate)
<h3>
Question #1:</h3>
False.
Melting is a type of chemical change.
<h3>Question #2:</h3>
True.
If the substance's atoms change in any way, it is a chemical change.
<h3>Question #3:</h3>
True.
If a substance is broken or torn, it's still the same substance. (Take tearing paper, for example)
<h3>Question #4:</h3>
False.
Take boiling water for example, when you boil water, it is still water, right?
<h3>Question #5:</h3>
False.
<em><u>Every</u></em> chemical or physical change in matter includes change in energy. <u><em>Not most.</em></u>
<h3>
Question #6</h3>
True.
Hydrogen peroxide (H2O2), has turned into water (H2O) and oxygen (O). The substance has change chemically, therefore it is an chemical change.
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I hoped this helps! If you have any questions, feel free to ask! ^^
Answer:
In a chemical reaction, only the atoms present in the reactants can end up in the products. No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
White blood cells are produced in the bone marrow in the tissue which is inside of the bone cavities.
Answer:
The average mass of all the isotopes.
Option B.
Explanation:
Have a great rest of your day.
