75. Solving a chemistry problem
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75. Solving a chemistry problem
20. Express in moles: a) 6.02∙1024 methane molecules; b) 1.8∙1028 chlorine atoms; c) 3.01∙1023 molecules of carbon dioxide; d) 30.1∙1025 phosphine molecules; e) 19.6 g of sulfuric acid.
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