Use a standard enthalpies of formation table to determine the change in enthalpy for this reaction. 2 NO(g) + O2(g) ---> 2 NO2(g) ΔΗ = Σ(nΔΗ°f products) - Σ(nΔΗ°f reactants) = [2(AHF of NO2(g))] - [2(AHºr of NO(g)) + (AHºr of O2(g)]​

Initially, the balloon had 3.0 liters of gas at a pressure of 400 kpa and was at a temperature of 294 k. if the balloon is cooled to 277 k and its volume decreased to 1 l, what will the new pressure in the balloon be?

How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.

Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?