Tantalum (Ta) is element 73 on the periodic table. A sample contains 3.53 x 1022 atoms of Tantalum. Calculate the amount of Tantalum [ ] mol Tantalum (Ta)

What is the polyatamic ion of thiosulfate

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?

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