Consider the reaction 3A + 4B --2C + 2D. The standard enthalpy of formation for A, B, Cand D are -309.0,55.0, -245.5, and -323.7, respectively in J/mol. What is the
standard enthalpy change for the reaction in kJ/mol?

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

the answer is c i took the test

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.