Hydrogen (h2) is burned completely with the stoichiometric amount of air during a steady-flow combustion process. if both the reactants and the products are maintained at 25°c and 1 atm and the water in the products exists in the liquid form, determine the heat transfer from the combustion chamber during this process. what would your answer be if combustion were achieved with 50 percent excess air?

These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat