Answer: 1.
: oxidation reduction
2.
: precipitation
3.
: Double displacement
Explanation:
Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.
Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.
![Cu(s)+4HNO_3(aq)rightarrow Cu(NO_3)_2(aq)+2NO_2(g)+2H_2O(l)](https://tex.z-dn.net/?f=Cu%28s%29%2B4HNO_3%28aq%29rightarrow%20Cu%28NO_3%29_2%28aq%29%2B2NO_2%28g%29%2B2H_2O%28l%29)
Double displacement reaction is defined as the reaction where exchange of ions takes place. Double displacement reaction in which one of the product remain in solid form are represented by (s) after their chemical formulas. Such double displacement reaction are called as precipitation reaction.
![Cu(NO_3)_2(aq)+2NaOH(aq)\rightarrow Cu(OH)_2(s)+2NaNO_3(aq)](https://tex.z-dn.net/?f=Cu%28NO_3%29_2%28aq%29%2B2NaOH%28aq%29%5Crightarrow%20Cu%28OH%29_2%28s%29%2B2NaNO_3%28aq%29)
Double displacement reaction is defined as the reaction where exchange of ions takes place.
![CuO(s)+2HCl(aq)\rightarrow CuCl_2(aq)+H_2O(l)](https://tex.z-dn.net/?f=CuO%28s%29%2B2HCl%28aq%29%5Crightarrow%20CuCl_2%28aq%29%2BH_2O%28l%29)
Single displacement reaction is defined as the reaction where more reactive element displaces a less reactive element from its chemical reaction.
Decomposition reaction is defined as the reaction where a single substance breaks down into two or more simpler substances.
Synthesis/Combination reaction is defined as the reaction where substances combine in their elemental state to form a single compound.
Answer:
25 grams
Explanation:
You strat off with 400 grams of your substance. By day 14, half has dcayed and you only have 200 grams left. By day 28, there are 100 grams of the substance. On day 42, there are 50 grams left. Finally, on day 56, the substance has been through four half-lives and 25 grams remain.
Explanation:
Knowing the number of valence electrons in one of the alien elements helps in identifying it because the number of valence electrons can help categorize the alien element. Similar elements have the same valence electrons and knowing the category of the element can help further analyze the element.
126,720 inches are in 2.0 miles
Answer:
the mass number decreases by 4 and the atomic number decreases by 2