- Is 18(O) an element or iron?

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Is epoxy waterproof? How many integers between 100 and 1000000 have sum of digits 1. equal to 5 2. less than 5? For a reaction, ΔrH° = –208.8 kJ and ΔrS° = –308.2 J/K. At what temperature will ΔrG° = 0.00 kJ? 0.68 K 677.5 K 1476 K 6435 K 0.85 K? Please help with this its the last question? 6 7/8 divided by (3 3/4) =?