Which material is the BEST conductor of heat at room temperature? O A. water
O
B. copper
O
C. sulfur
O D. air

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?

If 10.5 l of a at 0.98to 1.50 , is ?

What is the volume of 2.5 moles of nitrogen gas (n2)at standard temperature and pressure (stp)?