A mixture of sand and salt containig MgCl2 (100.0 g) is sprinkled on a section of pavement. The total estimated ice on the pavement is 10.0 kg. What is the freezing point of the ice (°C)? MM MgCl2 = 95.211 g/mol MM ice = 18.0148 g/mol

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

Which position represents spring in the southern hemisphere? a) b) c) d)

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?