Which element is used to "paint" the skin to prevent infection from cuts and scratches?

Match the mixture with the substance// i really need on this guys (it’s a pic btw)

Jose and eric were given four samples in lab. the results of their analysis are shown in the table. based on the data they collected, which sample is most likely a metal?

Calculate the frequency of a wave in a spring toy. the wave has a speed of 1.1 meters per second and a wavelength of 0.1 meters. *