24 September 2025

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• curprev 11:0911:09, 16 August 2025‎ Tawanna3622 talk contribs‎ 10,970 bytes +10,970‎ Created page with "<br>The formula mass of urea (NH₂CONH₂) is calculated by adding the atomic masses of its constituent elements: nitrogen (N), hydrogen (H), carbon (C), and oxygen (O<br>Read more<br><br><br><br><br><br><br><br><br><br>Chemistry<br><br><br><br><br><br><br><br><br><br>How did leucippus and democritus use atoms to explain different physical properties?<br><br><br>Asked by Anonymous<br><br><br><br>Leucippus and Democritus proposed that all matter is composed of indivisibl..."