In the periodic table how many elements could be classified as metals in group iv?

Which buffer would be better able to hold a steady ph on the addition of strong acid, buffer 1 or buffer 2? explain. buffer 1: a solution containing 0.10 m nh4cl and 1 m nh3. buffer 2: a solution containing 1 m nh4cl and 0.10 m nh3

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa

At element makes up all organic compounds?