Resistance of a material being scratched in known as . brittleness hardness softness density

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

Why is the structure of molecule important to its function?

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.