The elements of the periodic table are arranged on order of increasing(1) atomic number
(2) mass number
(3) number of isotopes
(4) number of moles

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

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