For 30 points and brainliest to the best correct answer Balance the following equations, show your work:

1. Al + O2 --> Al2O3

2. C3H8 + O2 --> CO2 + H2O

3. Al(NO3)3 + NaOH --> Al(OH)3 + NaNO3

Aphysical reaction is a process in which one or more reactants change into one or more products with different properties. select the best answer from the choices provided t f

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?

Drug abuse will not lead to physical and psychological dependence. true or false ?