Which one of the following is not a balanced equation? explain why.
a. c3h8 (g) + o2 (g) → co2 (g) + h2o (g)
b. c3h8 (g) + 5o2 (g) → 3co2 (g) + 4h2o (g)
c.2mg (s) + o2 (g) → 2mgo (s)
d.4na (s) + o2 (g) → 2na2o (s)

It's A because we have 3 C and 8H left and 1C and 2H on the right side.

There is one s orbital, and there are three p orbitals, five d orbitals, and seven f orbitals. thus, the answer is b. do not confuse the number of orbitals in a subshell with the number of electrons the subshell can hold. each orbital can hold two electrons, so the capacity of an nf subshell is 14 electrons.

Polyethylene is a strong synthetic polymer that can be used to make toys and bottles. polyethylene is a plastic material called thermoplastic. one very useful property of thermoplastic is that when it is heated it turns into liquid, which can be molded into desired shape and size. also the material do not dissolve at room temperature.