Will get 1. balance the equation for the reaction between zinc and hydrochloric acid. zn + hcl zncl2 + h2 2. balance the equation for the reaction between iron (steel wool) and oxygen (water). fe + o2 fe2o3

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.

How many neutrons does an element have if its atomic number is 50 and its mass number is 166