Explanation:
Atomic number of calcium is 20 and its electronic configuration is 2, 8, 8, 2. So, to acquire stability it loses 2 valence electrons and hence forms ion.
Whereas atomic number of calcium is 17 and its electronic distribution is 2, 8, 7. To attain stability its needs to gain one electron and hence then it forms ion.
Therefore, when both calcium and chlorine chemically combine together then they will form calcium chloride, that is, .
Thus, we can conclude that the chemical formula of calcium chloride is .
Answer:
Explanation:
Hello!
In this case, since the combustion reaction of methanol is:
In such a way, since there is 1:3/2 mole ratio between methanol and oxygen, we can compute the moles of oxygen that are needed to burn 2.56 moles of methanol as shown below:
Best regards!
Explanation:
Charges on both magnesium and oxygen is 2. Though opposite in sign, they have equal charges so, both of them will be cancelled by each other.
As a result, formula of magnesium oxide is MgO and not .
The student write the equation as , it is not correct.
Therefore, given equation will be balanced as follows.
Since, number of atoms on both reactant and product side are equal. Hence, this equation is completely balanced.