Which of the following dissociates in water to form the lowest concentration of H+
a. HCl (aq)
b. H2SO4 (aq)
c. HBr (aq)
d. H2CO3 (aq)

An experimental procedure requires a 10 ml of acid to be dissolved

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.

Quickly what are the following of organisms that existed over a wide area but only for a limited time period called a.soft fossils b.mold fossils c.index fossils d.trace fossils