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Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon
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F1.5 mol of nabh4 react, how many moles of b2h6 are formed? 2 nabh4(aq) + h2so4(aq) → 2 h2(g) + na2so4(aq) + b2h6(g)
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Johnny's bakery has 30,900 grams of sugar. a recipe calls for 32 pounds of sugar to be used. how much sugar will be left over? (1 lb=453.59 g).
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Choose the substance with the lowest vapor pressure at a given temperature. arco2cai2bf3pf5...
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