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Q20: Formula units of the compounds magnesium oxide,calcium
Q27: Which region in the following diagram corresponds
Q34: A 3.000g sample of a compound is
Q40: The number of waves that pass a
Q84: A sample of gas has a volume
Q86: The nucleus of an Ar-40 atom has
Q88: As the rate of evaporation of a
Q91: How many molecules of sulfur trioxide
Q93: The normal freezing point of water is
Q95: The electron configuration of an atom is