Explanation:
The given reaction is redox reaction but not combustion reaction.
Redox reaction : It is a chemical reaction in which oxidation and reduction occurs simultaneously.Oxidation is gaining of electrons and reduction is loosing of electrons.
oxidation
reduction
Potassium when reacts with water ,gives potassium ion in aqueous medium and combines with hydroxide ion present in water to form potassium hydroxide where as ions of water by gaining electrons (from potassium in water) gives hydrogen gas.
Hence , yes it is a redox reaction
Combustion reaction are the chemical reaction in which one reactant react with oxygen molecule to give heat and light.
Here in given reaction no oxygen molecule is appearing on reactant side.
Hence not a combustion reaction.
If you add a potassium nitrate and saturated solution you will make a super-saturated solution of potassium nitrate. But what to expect with this process of adding these 2. It is that the result of this solution made/forms bigger crystals that have pointed ends. If there is no appearance of the crystal it shows that the solution is not yet cooled.
Answer: The heat absorbed by the water is 52.823 J.
Explanation:
Given: Mass of metal = 5.05 g
Specific heat of water = 4.184
Initial temperature =
Final temperature =
Formula used to calculate heat absorbed is as follows.
where,
q = heat
m = mass of substance
= initial temperature
= final temperature
Substitute the values into above formula as follows.
Thus, we can conclude that heat absorbed by the water is 52.823 J.
Density
=mass÷volume
=19.67÷5.90
=3.33 g/ml
Answer:
An observation
Explanation: observation can also involve the perception and recording of data via the use of scientific instruments. The term may also refer to any data collected during the scientific activity