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A sample being examined by laser ablation-inductively coupled plasma-mass spectrometry has a density of 4.07 g/mL. After a 19.0-ns laser pulse a crater with a diameter of 33.4 m and a depth of 1.269 m was created. If the energy of the laser pulse was 2.68mJ,

1. Find out the laser power density in watts per square centimeter. (W/cm3)

2. Explain how much sample mass was removed by the laser pulse? Presume the crater has a cylindrical shape. (ng)?

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