Answer:
Answer:
step 1:balance skeleton equation the chemical equation:
Zn +HNO3➔Zn(NO3)2+NO+H2O
step 2: identity undergoing oxidation or reduction
here
Zn➔Zn(NO3)2
Zn is oxidized from 0 to 2 in oxidation no.
HNO3➔NO
N is reduced from 5 to 2 in oxidation no
Step 3: calculate change in oxidation no.
change in oxidation no
in Zn=0-2=-2=2
in
N=5-2=3
Step 4: Balance it by doing crisscrossed multiplication
we get;
3Zn +2HNO3➔3Zn(NO3)2+2NO+H2O
step 6:Balance other atoms except H & O
3Zn +2HNO3➔3Zn(NO3)2+2NO+H2O
3Zn +2HNO3+6HNO3➔3Zn(NO3)2+2NO+H2O
finally: balance H
<em><u>3Zn +8HNO3➔3Zn(NO3)2+2NO+4H2O</u></em>
Answer:
The central atom has 3 electron domains.
Explanation:
According to the Valence Shell electron pair repulsion theory (VSEPR) put forward by Gillespie and Nyholm in 1957, the shape of a molecule is determined by repulsion between all the electron pairs (electron domains) present in the valence shell.
The electron pairs or electron domains are known to position themselves as far apart in space as possible in order to minimize repulsions.
Hence, when the central atom of a molecule contains three electron domains, they are positioned at an angle of 120° from each other to minimize repulsions. Hence the answer.
Answer:
statement best describes the total number of carbon atoms during cellular
respiration in the fish is :
The total number of carbon atoms stays the same because the carbon from the carbon-containing food molecules is used to make molecules such as carbon dioxide
Explanation:
Respiration : It is a process in which energy from the "food" molecule is released in the form of ATP
ATP = Adenosine Triphosphate
There are two kind of respiration process:
1. In the presence of O2 = Aerobic Oxidation
2. In the absence of O2 = Anaerobic Oxidation
The breakdown of food into CO2 occur by three main process:
Glycolysis
Krebs cycle
Phosphorylation
The reaction for the Decomposition of the Glucose molecule is written as:

It is a oxidation - reduction reaction(Redox).
Here one substance is oxidised and other is reduced.
The number of Carbon atoms in reactant =6
It will produce = 6 CO2 in which the number of C=6
Hence ,
The total number of carbon atoms stays the same because the carbon from the carbon-containing food molecules is used to make molecules such as carbon dioxide