How is science based on observation used as evidence? How can this evidence be used? 15 POINTS AND BRAINLIEST

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

How many lone pairs of electrons are on the central atom of no3- and what is the molecular shape? one, trigonal planar zero, trigonal pyramidal zero, trigonal planar one, tetrahedral one, trigonal pyramidal

Which of the following statements is true about energy quantization at the atomic level? electrons in the outermost orbits are the most stable. electrons in all the orbits around the nucleus have the same amount of energy. electrons in the orbit closest to the nucleus have the least amount of energy. electrons absorb or release the same amount of energy independent of the energy levels.