A hydrocarbon sample containing carbon, hydrogen, and oxygen, and weighing 1.70 grams was subjected to combustion analysis. Its combustion produced 1.46 g CO2 and 0.596 g H2O. What is the subscript on the oxygen in the empirical formula for the hydrocarbon?

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?