The reaction for the combustion of octane (c8h18) is given in this reaction: 2c8h18 + 25o2 → 16co2 + 18h2o how many grams of h2o are produced if 228 grams of octane are burned? 181 grams 228 grams 81 grams 324 grams

Based on the equation and the information in the table, what is the enthalpy of the reaction?

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For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)