The first four ionization energies for an imaginary element, Xz, are E1 = 102 kcal, E2 = 186 kcal, E3 = 4021 kcal, and E4 = 4862 kcal. The most probable number of valence electrons as indicated by this ionization data is: 0
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Agas has a volume of 0.7 l at 300 mmhg. what would be the new volume at 900 mmhg

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.