In a closed system containing three different gases as shown, x2 + y2 2xy. choose the two things that must happen as the volume of the system is decreased at constant temperature. 1)the relative concentrations of each gas must change. 2)the concentration of each gas will increase. 3) the relative concentrations of each gas must remain constant. 4)the concentration of each gas will not change.

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.