Calculate the ΔH°rxn for the combustion of methane using the given ΔH°f. ΔH°f methane (g) = -74.60 kJ/mol, ΔH°f, water(l) = -285.8 kJ/mol; ΔH°f carbon dioxide (g) = -393.5 kJ/mol.

At stp, what is the volume of 1 mole of co2?

Which describes interactions between substances and stomata during photosynthesis? check all that apply. oxygen enters stomata. oxygen is released through stomata. carbon dioxide enters stomata. carbon dioxide is released through stomata. hydrogen enters stomata. hydrogen is released through stomata.

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here