¿Qué masa de hidróxido de sodio (NaOH) (masa de soluto), se debe disolver en agua para preparar 200 g de una solución 5 % p/p?

Which uses electromagnetic radiation to discover the properties and composition of bodies in space? space probe space station space shuttle space observatory

When electrolyzing copper (ll) chloride, what reaction takes place at the anode? what reaction takes place at the cathode?

How many moles of lead are in 1.50 x 10^12 atoms of lead? could you explain the answer as well and not just give it to me i am refreshing for finals and i need to know how to do it