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anonymous

  • 4 years ago

What is the mass, in grams, of a sample of 1.72 × 1023 atoms of potassium (K)? Show your work or explain the steps that you used to determine your answer

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  1. anonymous
    • 4 years ago
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    please help have no clue what to do

  2. Rogue
    • 4 years ago
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    Alright, there are 6.01 x 10^23 particles/atoms in a mole. So can you calculate how many moles of Potassium there are in 1.72 x 10^23 atoms?

  3. Rogue
    • 4 years ago
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    6.02 x 10^23*

  4. Rogue
    • 4 years ago
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    Unfortunately, your not here, so... \[\frac {1.72 * 10^{23} K atoms}{6.02 * 10^{23} atoms/mol} \approx 0.286 mol K\] There are 39.0983 grams of potassium in every mole.\[0.286 mol K * 39.098 \frac {g}{mol K} \approx 11.2 grams Potassium\]

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