Answer: 4 moles of Na are needed to produce 4 moles of NaCl
Explanation:
The balanced chemical equation is :
According to stoichiometry :
2 moles of
are formed from = 2 moles of 
Thus 4 moles of
will be formed from =
of 
Thus 4 moles of Na are needed to produce 4 moles of NaCl
Just use q=mCDeltaT
q=energy
m=mass
c=specific heat
Delta T= Change in temperature
<u>Answer:</u> This element has +2 charge on it.
<u>Explanation:</u>
An ion is formed when an atom looses or gains electrons.
- When an atom looses electrons, it leads to the formation of positive ion known as cation.
- When an atom gains electrons, it leads to the formation of negative ion known as anion.
Magnesium is the 12th element of the periodic table having electronic configuration of 
This element will loose 2 electrons to attain stable electronic configuration and leads to the formation of a cation having formula 
Hence, this element has +2 charge on it.
The number of valence electrons in
will be 26.
The atom's outermost inhabited shell is where valence electrons are found. They are significant because they have a major impact on how an atom's chemical characteristics are determined.
The number of valence electron in P in 5 and number of valence electron in Cl is 7. There are one molecule of P and three molecule of Cl in
molecule. By adding all valence electrons , the total number of valance electrons will be 26.
The Lewis structure of
is shown as:
Therefore, the number of valence electrons in
will be 26.
To know more about valence electrons
brainly.com/question/13993867
#SPJ4