Ionic bonds are made up of a metal and a nonmetal elements while covalent bonds are are made up of two metal. So, you can just look at the periodic table and identify which compounds have two metals and which have one metal and one nonmetal. Also, those compounds with high electronegativity difference are very likely to be ionic while the opposite is covalent. HOWEVER, some compounds can be both covalent and ionic. For instance, if HCI gas is at higher temperatures, then it is ionic while it would be covalent at room temp.
Hope I've helped.
- Dotz
Answer : The final temperature of the mixture is 
Explanation :
In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.
And as we know that,
Mass = Density × Volume
Thus, the formula becomes,
where,
= 
= specific heat of water = same
= 
= mass of water = same
= 
= density of water = 1.0 g/mL
= volume of water at 
= 
= volume of water at 
= 
= final temperature of mixture = ?
= initial temperature of water =
= initial temperature of water =
Now put all the given values in the above formula, we get:
Therefore, the final temperature of the mixture is
The answer is A because the time wouldn't affect the weather that much depending on the circumstances.
