The enthalpy of combustion for octane (c8h18( a key component of gasoline, is -5,074 kj/mol. this value is the hrxn for which of the following reactions?

a- 2c8h18(l) + 25o2(g) 16co2(g) + 18h2o(g)
b- c8h18(l) + 12.5o2(g) 8co2(g) + 9h2o(g)
c- 16co2(g) + 18h2o(g) 2c8h18(l) + 25o2(g)
d- 8co2(g) + 9h2o(g) c8h18(l) + 12.5o2(g)

What is the molarity of a solution that is prepared by adding 57.1 g of toluene (c 7 h 8 ) (density = 0.867 g/ml) to a 250 ml volumetric flask, and then filling to the mark with benzene (c 6 h 6 ) (density = 0.876 g/ml)?

56.16 gregor mendel was the first scientist to use statistics to analyze scientific data. before mendel's experiments, scientists believed that organisms acquired traits from their environment and passed them on to their offspring. after mendel's discoveries were accepted, scientists realized that traits passed to offspring were the result of genes being passed from parents to offspring. this is an example of pls

Δu of , in kj/kg, as it isto k, (a)as a of , (b) at , (c) at .