Calculating Gold Atoms: Mole Concept and 15% Pure Gold Mass

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SUMMARY

The discussion focuses on calculating the number of gold atoms in a 2.5g sample containing 15% pure gold. The correct approach involves first determining the mass of pure gold by calculating 15% of 2.5g, which equals 0.375g. This mass is then converted to moles using the molar mass of gold (approximately 197 g/mol), followed by multiplying the resulting moles by Avogadro's number (6.022 x 1023) to find the total number of gold atoms.

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  • Understanding of the mole concept in chemistry
  • Knowledge of Avogadro's number
  • Familiarity with calculating percentages
  • Basic skills in unit conversion
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  • Learn about the mole concept and its applications in chemistry
  • Study the calculation of moles from mass using molar mass
  • Explore Avogadro's number and its significance in atomic calculations
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Chemistry students, educators, and anyone interested in atomic calculations and the properties of gold will benefit from this discussion.

Kelly09
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How many Gold atoms are in Gold mass of 2.5g? 15 percent of the mass is pure Gold.
So first i found 15 percent of the mass which i used to calculate the number of moles. Then i multiplied the moles by Avogadros number to give me the atoms. Anyone help
 
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Not sure what kind of help you need - what you wrote sounds like a correct approach to the problem.

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