Name the gas evolved when Zn reacts with dil. HCI (choose the answer from the following) 1. O2 2. H2 3. CO2 4. Cl2

Calculate the expected ph values of the buffer systems from the experiments (a,b,c,d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

Which of these expressions are correct variations of the combined gas law? p1v1t2 = p2v2t1 both

Acetylene gas c2h2 undergoes combustion to produce carbon dioxide and water vapor how many grams of water are produced by the same amount of c2h2?