1. How would you determine the proper number of significant figures for the volume of liquid using your measuring equipment? For example, if you used a kitchen measuring cup with measurement intervals on the side, how would you report the measurement in the correct number of significant figures?

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.)

How many moles of gas are present if p=11 atm, v=12l, t=185k?

How many mmols of tris-hcl are there in 100 ml of a 100 mm tris-hcl buffer solution at ph 8.1? note that the 100 mm refers to the sum of tris and tris-hcl concentrations?