Consider the unbalanced equation for the combustion of hexane:
2c6h14(g)+19o2(g)→12co2(g)+14h2o(g)
determine how many moles of o2 are required to react completely with 7.9 moles c6h14.

Does the energy in a solid increase or decrease when changing to a liquid?

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?

If you add 5.00 ml of 0.100 m sodium hydroxide to 50.0 ml of acetate buffer that is 0.100 m in both acetic acid and sodium acetate, what is the ph of the resulting solution? acetic acid: ka = 1.8. x 10-5