HURRY WILL GIVE BRAINLIST The amount of oxygen in the reactants is 4 atoms. In the products, the oxygen is distributed to water (H,0) and O2
gas. Which coefficients would be placed in front of water and oxygen?
O 2 in front of water and 2 in front of oxygen
O 1in front of water and 2 in front of oxygen
O 1 in front of water and 1 in front of oxygen
O 2 in front of water and 1 in front of oxygen

Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?