7. Sodium chloride is produced from its elements through a synthesis reaction. What mass of each reactant would be required to produce 25.0 mol of sodium chloride? Na + Cl2 → NaCl.

Mass of Cl₂  = 887.5 g

Mass of Na = 575 g

Explanation:

Given data;

Number of moles of sodium chloride produced = 25.0 mol

Mass of Na required = ?

Mass of Cl₂ required = ?

Solution:

Chemical equation:

2Na  +   Cl₂    →      2NaCl

now we will compare the moles of sodium chloride with both reactant.

                      NaCl         :          Na

                         2            :           2

                      25.0         :         25.0

                    NaCl          :          Cl₂

                       2             :           1

                      25.0        :          1/2 ×25.0 = 12.5 mol

Mass of Na:

Mass = number of moles × molar mass

Mass = 25.0 mol × 23 g/mol

Mass = 575 g

Mass of Cl₂:

Mass = number of moles × molar mass

Mass = 12.5 mol × 71 g/mol

Mass = 887.5 g

quartz

explanation:

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.