A student uses a variety of techniques to separate four different compounds from 2.10 g of a mixture. After separation of the mixture, the student weighs each compound and finds 0.443 g of naphthalene, 0.295 g NaCI, 0.344 g of sand, and 0.688 g
of iron.

Much of the general structure and physical properties of the interior of the earth are inferred from: a)deep oil and gas bore holes b)geologic investigations c)analysis of seismic waves d) study of volcanoes

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

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.