A mixture of krypton and methane gases contains krypton at a partial pressure of 471 mm Hg and methane at a partial pressure of 263 mm Hg. What is the mole fraction of each gas in the mixture

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)

Calculate the temperature rise when 0.2g of propane is used to heat 400cm cubed of water.