Give the number of significant figures in this number: 40

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

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

What is the subscript for oxygen in its molecular formula