Answer:
the most common oxidation no.of manganese is +2 +3 +4 +6 +7
Answer:
What type of soil filters water best?
Explanation:
dependent variable - the cleanliness of the water after it is filtered
independent variable - soil
control variable - water
(Asking with a <em>please </em>wouldn't hurt -_-)
Answer:
The correct answer is
2. Water
Explanation:
The specific heat capacity is the amount of heat required to raise the temperature of a unit mass of a substance by one degree. It is connected to the capacity of the substance to retain heat as well as the rate at which it will cool down or heat up when exposed to a specific amount of heat loss or heat supplied. A substance with a low heat capacity such as iron will cool down or heat up more quicker than a substance with a high heat capacity such as water.
From the list of substances water has the highest heat capacity, (4.18 J/g) as such it will retain heat for the longest period of time.
Answer: Option (b) is the correct answer.
Explanation:
A spontaneous reaction is defined as the process which tends to occur on its own. It does not require any external factor or force in order to start itself.
For example, when we dissolve KCl in water then potassium chloride being ionic in nature will dissolve on its own. Hence, it will be a spontaneous process.
And, a non-spontaneous reaction is defined as a process for the completion of which we have to provide certain conditions.
Thus, we can conclude that the statement it does not require any external action to begin, is true about a spontaneous process.