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tensa zangetsu [6.8K]
3 years ago
9

In an experiment you are asked to react hydrochloric acid with sodium hydroxide. When measuring the volume of the reactants, whi

ch instrument would give the greatest precision?
Chemistry
1 answer:
Bingel [31]3 years ago
7 0
What are the options? based on the volume it can differ but in general pipettes and graduated cylinder are the best.  <span />
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What is the product if an atom of Po-209<br> undergoes alpha decay?
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<h3>Answer:</h3>

Lead-205 (Pb-205)

<h3>Explanation:</h3>

<u>We are given;</u>

  • An atom of Po-209

We are supposed to identify its product after an alpha decay;

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  • When an element undergoes an alpha decay, the mass number decreases by 4 while the atomic number decreases by 2.
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  • The product from this decay is Pb-205, because Pb-205 has a mass number of 205 and atomic number 82.
  • The equation for the decay is;

²⁰⁹₈₄Po → ²⁰⁵₈₂Pb + ⁴₂He

  • Note; An alpha particle is represented by a helium nucleus, ⁴₂He.

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