- Can I get some help even if its just on a few of them?

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What evolved sooner? Brain or Heart? Is power use a useful way to measure by which to compare appliances, and if so why? A container holds 8.0 kg of water at 25'C. how much energy must be added to water to create 2.0 kg of steam? 4 Fe(s) + 3O2(g) ->2Fe2O3(g). 27.3 g of iron reacts with 79.9 g of Oxygen. How many grams of the excess reactant remain after the reaction? Find the sixth term of the geometric sequence, given the first term and common ratio. A1=5 and r=3/2?