How many mols of CaC2 are needed to react completely with 60.2 mols of H2O? CaC2 + 2H2O → C2H2 + Ca(OH)2

30.1 moles of CaC₂  are needed.

Explanation:

Given data:

Number of moles of CaC₂ needed = ?

Number of moles of H₂O = 60.2 mol

Solution:

Chemical equation;

CaC₂ + 2H₂O      →    C₂H₂ + Ca(OH)₂

Now we will compare the moles of CaC₂ and H₂O.

                           H₂O       :       CaC₂        

                             2          :          1

                           60.2      :        1/2×60.2 = 30.1 mol

30.1 moles of CaC₂  are needed.

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell