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Standard Form in Atomic Mass Calculations

Standard Form in Atomic Mass Calculations

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The mass of one atom of nitrogen is \(2.33\times {{10}^{-11}}\) picograms. (\(1\) pico \(={{10}^{-12}}\))

  1. Express this mass in grams, giving your answer in standard form.
  2. A molecule of nitrogen dioxide \({\left(\mathrm{NO}_2\right)}\) contains one atom of nitrogen and two atoms of oxygen.
    Given that the mass of one atom of oxygen is \(2.66\times {{10}^{-23}}\)grams, find the mass of one molecule of nitrogen dioxide.
    Give your answer in grams in standard form.

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Answer:(i) \(2.33\times10^{-23}\text{ g}\). (ii) \(7.65\times10^{-23}\text{ g}\).

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