How much volume in ml of 0.65 m hci solution can be made by diluting 150 ml of 9.75 m hci

What are the percent by mass of copper in penny lab

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?