Which statement describes the roles of photosynthesis and respiration in the oxygen cycle? Photosynthesis and respiration both put oxygen into the atmosphere.

Photosynthesis removes oxygen from the atmosphere, and respiration puts oxygen into the atmosphere.

Respiration and photosynthesis both remove oxygen from the atmosphere.

Respiration removes oxygen from the atmosphere, and photosynthesis puts oxygen into the atmosphere.

Schrodinger and heisenberg developed an alternate theory about atomic nature that contradicted some of bohr's model of the atom. how do changes resulting from new technology and evidence affect the reputation of the atomic theory?

Which of the following electromagnetic waves can create ions?

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.