If 5.0 mL of 0.1 M NaOH is added to 50.0 mL of 0.1 M HCl, what will be the resulting pH of the solution

Burned piece of steel wool does not gain mass. so only d could be true.

Bromine has atomic number  35  which means there are  35 protons  and  44  neutrons to give a total of 79 nucleons. the fact that it's a positive ion means that it has lost an electron; so there'll be  34 electrons. 

Increase temperature

B)rock pieces are moved from place to place