Calculate the change in enthalpy for the reaction, given the associated enthalpies of formation. 2NO(g)+O2(g)⟶2NO2(g)ΔHf, NO2=33.2 kJΔHf, NO=90.2 kJ Round the answer to three significant figures.

Which of the following statements is true? question 4 options: nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not. chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not. neither chemical reaction rates nor nuclear decay rates vary with the conditions of the reaction. both chemical reaction rates and nuclear decay rates vary with the conditions of the reaction.

Which sentence best describes the formation of igneous rock? a- lava on the surface dries up and makes arock b_melted rocks cools and forms crystals c_rocks under tremendous heat and pressure d_magma is melted rock underground

What is the mass of 0.46 mil of mgcl2