- How many mols are in 254 grams of iron (II) oxide (and why please)?

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Algebra help please G is inversely proportional to the square of a. If a = -3 when g = 9, find two values for a, which will make g equal 25? A sample of propane, C3H8, contains 10.8 moles of carbon atoms. How many total moles of atoms does the sample contain? Help with this question please? For math? Stab it with a pencil? Express the following functions in the form a(x - h)2 + k. (b) f (x) = 2x2 - 40x + 209 (c) f (x) = -4x2 - 8x - 11 Thank you!!!?