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Among the substances listed, iron (Fe) would have the greatest ductility. Ductility refers to the ability of a material to deform under tensile stress, and metals like iron are known for their malleability and ductility. In contrast, compounds like NaCl (sodium chloride) and SiO2 (silicon dioxide) are brittle and do not exhibit significant ductility. Carbon in the form of graphite (C(s)) has some ductility, but it is generally less ductile than iron.
What else can I help you with?
What is silicon in SiO2s?
Si02 is the chemical formula for silicon (Si) dioxide. It is major component to consumer and automotive glass, and used by the high tech industries for fabricating fiber optic cables.
How long would it take to count atoms in a grain of sand?
This is tricky because, believe it or not, there are potentially as many atoms in a grain of sand as their are stars in the entire universe. But, here goes. Sand is made up of Silica, which has the formula SiO2 silicon weighs 28 atomic units Oxygen weighs 16 atomic units so each SiO2 weighs 60 atomic units There are 6.023 x 1023 atomic units in a gram. that is 6 with 23 zeros after it. So there would be 6.023 x 1023 / 60 = 1x 1022 SiO2s in a gram, so 3 x 1022 atoms in a gram. Say a grain of sand is 1mm across it has a volume of 0.001cm3;1cm3 of sand weighs about 2.6g, so a grain of sand will weigh 0.0026g. So, to find the number of atoms in a grain of sand we multiply the number of atoms per gram by the number of grams: 3 x 1022 x 0.0026g = 7.8 x 1019 atoms or 78,000,000,000,000,000,000. Assuming you could count 2 atoms per second, it would take approximately 1,236,681,887,366 (1.2 Trillion) years. Yes, really. If I were you I would try counting at least four every second, then it would only take 6.2 billion. You'd have a lot more free time.
