What does below chemistry rebus means?

Can you move 2 matchsticks to form four equal sized squares.

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

If eleven plus two equals one, what does nine plus five equal?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

Complete the table series riddle by finding the number that can replace "??".

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

Role Action
Block Prevents the target player from acting
Redirect Change target player target.
Save Protects the target player from death.
Seer Sees all actions that occurred
Murderer Kills the target player

The following five players are playing:

Andy
Brian
Chris
Daniel
Fred

You are Andy the Seer and you saw the following things:
a) Brian was redirected to Chris.
b) Chris was blocked.
c) Daniel was killed.

Who is the murderer then?