9.1 x 1021 molecules of C2H2802​

Identify one disadvantage to each of the following models of electron configuration: dot structures arrow and line diagrams written electron configurations type in your answer below.

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

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