can be renewable or nonrenewable.
isn't it fossil fuels? i'm not sure

Working with si (metric) units for each of the following commonly used measurements, indicate its symbol. liter gram milliliter kilogram meter centigram milligram centimeter kilometer second millimeter milliseconds

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?

In the reaction h2co3 (aq) + 3nh3 (aq) = 2 nh4+ (aq) + co3 2-, how many electrons are transferred?