A sample of pure gold has a mass of 15.8 g. Calculate the number of moles in the sample and gold atoms in the sample.   (a) moles in the sample  ?moles (b) gold atoms in the sample  ?atoms

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Q: You have 1.0 kg of aluminum and 1.0 kg of lead. Which one has: (a) A higher number of moles? (b) A…

A:

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Q: (a) How many molecules of gas are there in this sample? (b) How many moles of gas are there in this…

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A:

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Q: Gold has a molar mass of 197 g/mol. (a) How many moles of gold are in a 3.30 g sample of pure gold?…

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A: ....

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Q: A semi-permeable membrane separates the contents of cell. The concentration of sodium ions is 2 mol…

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Q: Gas is contained in a 7.00-L vessel at a temperature of 21.0°C and a pressure of 5.00 atm. (a)…

A: The Ideal Gas Law is PV=nRT ................................. (1) Where P is pressure: 5.00atm; V is…

Diatomic Gas

Molecule, is a collection of two or more atoms together (which constitute the smallest observable unit) into a pure material. There are some ways to represent the structure of a molecule. Factor symbols represent atoms in Lewis structures, and dots represent electrons that accompany them. A pair of mutual electrons (covalent bond) may be represented by a single dash. The ball-and-stick model depicts the spatial structure of the atoms better.