Tetrachloroethylene, C2Cl4, is a dry cleaning fluid made from acetylene (C2H2), Cl2, and Ca(OH)2 according to this equation: C2H2(g) + 3Cl2(g) + Ca(OH)2(8) C2Cl4 (1) + CaCl2(s) + 2H2O(1)
How many moles of Cl2 are needed to react with 4.5 mol of C2H2?

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

c. electrical charges of ionic bonds.