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What is the most important factor in determining climates.
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Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by
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The sum of the oxidation numbers in a neutral compound is always
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The combustion of methane, ch4, releases 890.4kj/mol. that is, when one mole of methane is burned,890.4 kj are given off to the surroundings. this meansthat the products have 890.4 kj less than the reactants.thus, ah for the reaction = - 890.4 kj. a negative symbolforah indicates an exothermic reaction.ch (g) + 20 (g)> co2 (g) + 2 h0 (1); ah = - 890.4 kga) how much energy is given off when 2.00 mol of ch,are burned? b) how much energy is released when 22.4g of ch. areburned?
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How much energy (in J ) is lost when a sample of iron with a mass of 27.8 g cools from 76.0 ∘C to 27...
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