What do the symbols tell you about the conditions of the reactions shown to the right? check all of the boxes that apply.
the products and reactants of both reactions are gases.
reaction 1 occurs at high pressure.
reaction 2 makes a small amount of an additional product.
a catalyst is used for reaction 2.

Which solution is an example of a nonelectrolyte? a. iodine in hexane b. sodium nitrate in waterc. acetic acid in waterd. hydrogen chloride in water

What is the independent variable in this investigation? mass volume sample number substance density

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.