Thermal energy when solid, liquor , and gas combine
Answer:
C) Chemical changes involve formation of a new substance while physical change only impacts appearance or form.
Explanation:
The obvious difference between a chemical change and physical change is that in a chemical change new substances are produced while in a physical change, the form of the compounds are altered.
- Most phase changes are products of physical changes. Such changes are easily reversible.
- In a chemical change, a new kind of matter is formed. It is accompanied by energy changes.
- The process is not easily reversible.
Answer:
Kr-81 is most stable because of its high half lige and kr-73 is the most radioactive because of its least half life
Explanation:
Stability is directly proportional to half life of a reaction
Answer: The value of equilibrium constant for new reaction is
Explanation:
The given chemical equation follows:
The equilibrium constant for the above equation is 
We need to calculate the equilibrium constant for the equation of 3 times of the above chemical equation, which is:
The equilibrium constant for this reaction will be the cube of the initial reaction.
If the equation is multiplied by a factor of '3', the equilibrium constant of the new reaction will be the cube of the equilibrium constant of initial reaction.
The value of equilibrium constant for reverse reaction is:
Hence, the value of equilibrium constant for new reaction is
Answer:
The answer to your question is KNO₃ is soluble and Fe(OH)₃ is insoluble.
Explanation:
Data
Potassium hydroxide (KOH)
Iron nitrate Fe(NO₃)₃
Double displacement reaction
3KOH + Fe(NO₃)₃ ⇒ 3KNO₃ + Fe(OH)₃
Conclusion
KNO₃ is soluble because compounds containing alkali metals ions are
soluble and also compounds containing nitrate ion are soluble.
Fe(OH)₃ is insoluble because compounds containing OH are insoluble
except Ba(OH)₂