Object permanence is the understanding that objects continue to exist even when they cannot be observed (seen, heard, touched, smelled or sensed in any way
Bohr's
Explanation:
Experimental evidence of Rutherford best supports the Bohr's model of the atom.
Rutherford performed the gold foil experiment in which he bombarded thin gold foil with alpha particles. He found that most of the particles passed through with just few bouncing back.
With this knowledge, he proposed the nuclear model of the atom. The model suggests that an atom is made up of a positively charge dense center and a large space outside where electrons revolves.
- The Bohr's model of the atom was based on quantum mechanics proposed by Planck.
- He assumed the Rutherford's model and suggested that the extranuclear space is made up of electrons in spherical orbits around the nucleus.
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Answer:
Molality, Solvent, Solute, Mole fraction, Molarity.
Explanation:
The expression of concentration that provides the moles of solute per kilograms of solvent is Molality. This in the only expression referred to the solvent.
A solution is made up of 0.15 grams of sodium chloride in 1 liter of water. For this solution, the Solvent is water. When water is present, it is usually considered the solvent.
A solution is made up of 0.15 grams of sodium chloride in 1 liter of water. For this solution, the Solute is sodium chloride. There can be 1 or more solutes in a solution.
If you place 5 moles of sodium chloride and 4 moles of sucrose into 11 moles of water, the Mole fraction of sodium chloride would be 0.25. The mole fraction is equal to the moles of a substance divided by the total number of moles.
A way to express concentration that provides the moles of solute per liter of solution is Molarity.
Answer:
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Because salt water is denser than freshwater.
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