Astudent performed flame tests on several unknown substances and observed that all of the flame colors were shades of red. what could the student do to correctly identify these substances? explain your answer.

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

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. *