Four methods of propane preparation chemical equation?

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.

In 2002, the rare earth elements mine in mountain pass, california was closed because

Which description best characterizes the motion of particles in a solid?