<span>A) 2NaOH -> 2Na + O2 + H2
is not correct since Na is unstable
B) 2NaOH -> 2Na + H2O + 1/2O2
is not correct since Na is unstable
C) 2NaOH -> Na2O + H2O
is correct since N2O is stable
D) 2NaOH -> 2Na + H2O2
is not correct since Na is unstable</span>
Answer:
The process to use this knowledge is explained as below:
Explanation:
1. Farmer should use an indicator to check the pH value of the soil of the field of the farm.
2. If the field or the farm has alkali soil add acid to reduce the pH value.
3. If the soil of the farm is acidic for the crop add alkali to increase the pH value.
4. It will be a neutralization reaction and changes the pH value of the farm.
5. Weather/leeching into the surrounding soil/plant or animal waste will lead to a change in pH value over time.
6. The pH value will need to be regularly monitored and adjusted.
The correct answer is
D burning wood
because it's changing the wood.
The other's are physical changes because it's still the same thing, it's just in a different form.
Glad I could help, and good luck!
AnonymousGiantsFan
Answer:
C
Explanation:
This is the only option that could produce an objective answer through experimentation or studies. The other options can be answered subjectively and are opinion based. They could not be answered scientifically.
