The concentration of hydrogen ions in a soil sample is 1.3 x 10-6M. When the soil is tested with a pH meter, what value should the meter read? Explain pls! A.6.2

B.5.9

C.1.9

D. 1.3

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3 -> a2cr(no3)3 + a3ag2so4

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?