Which of the following is a valid mole ratio from the balanced equation 2Fe2O3 + 3C – 4Fe + 3CO2? 2mol FeO,
4 mol Fe
4 mol C
3 mol Fe
3 mol C
4 mol CO2
2 mol Fe, o,
4 mol C

Summarize possible ways in which phases of matter could combine to form a solution.

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?

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.