The diagram above shows different kinds of changes in a chemical reaction, and many of these changes can be seen with the human eye. How do we know something is a chemical reaction if we cannot see a change in the substance?
Match the four types of chemical reactions to their definition.
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Decomposition | arrow_right_alt | A chemical reaction where two or more substances combine to form a single compound. |
Replacement | arrow_right_alt | One compounds breaks down into two or more substances. |
Combustion | arrow_right_alt | Elements or ions switch places with the present elements or ions. |
Synthesis | arrow_right_alt | A substance combines with oxygen and releases energy. |
What is the type of chemical reaction that absorbs thermal energy?
Put the options below in order for the general chemical equation structure.
A single-replacement chemical reaction is a reaction where one element replaces another element or compound.
Draw the products of the formula showing a double-replacement chemical reaction.
❤️ 🟩 + 🔷 🟣 -->
What is the Law of Conservation of Mass?
Combining hydrogen and oxygen to form water is an example of which kind of chemical reaction?
Match the definitions of precipitate (verb) and a precipitate (noun).
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Precipitate (noun) | arrow_right_alt | clouds becoming too heavy to hold any more water, the the water vapor turns into liquid and falls to the ground. |
Precipitate (verb) | arrow_right_alt | When two liquids combine to become a solid. |
Match the substances to what they are showing, and if it is a single element or a chemical formula.
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Au | arrow_right_alt | Element |
Mg(OH)2 | arrow_right_alt | Element |
NaCl | arrow_right_alt | Element |
He | arrow_right_alt | Chemical Formula |
H2O2 | arrow_right_alt | Chemical Formula |
Li | arrow_right_alt | Chemical Formula |
Why do all chemical reactions conserve energy?
Why does a chemical reaction, such as setting off a firework, have a faster reaction rate?
Why is getting sick with the flu bacteria an example of an inhibitor?
Balance this equation, and rewrite the balanced formula in the drawing attached:
FeO2 + Cl --> Fe + Cl4O2
Balance this equation, and rewrite the balanced formula in the drawing attached:
Cu + H2SO4 + Fe3Li --> CuSO4 + H2OLi2 + Fe2
Balance this equation, and rewrite the balanced formula in the drawing attached:
Fe3Ag8 + O2 --> FeO2 + Ag2O
Balance this equation, and rewrite the balanced formula in the drawing attached:
P4O10 + Zn2Xe --> Zn3P + O5 + Xe