What is the difference between a diatomic element and a compound

2. how is heavy water different from normal water

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

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