From the following enthalpy changes, H2(g) + 1/2O2(g) H2O (I) AH = -285.8 kj
N2O5(g) + H2O (I) 2 HNO3 (I) AH = -76.6 kj
1/2 N2(g) + 3/2 O2(g) + 1/2 H2(g) HNO3 (I) AH = -174.1 kj
calculate the value of AH for the reaction
2 N2 (g) + 5 O2 (g)

The nuclear fission process releases neutrons and question 27 options: alpha particles electrons energy beta particles

[ou.03jthe pictures below show the wavelengths and intensities of electromagnetic radiations emitted by three stars, star 1, star 2, and star 3. intensity intensity- intensity- 1000 3500 6000 8500 11000 wavelength (a) star 1 1000 3500 6000 8500 11000 1000 3500 6000 8500 11000 wavelength (a) wavelength (a) star 2 star 3 which of these statements is correct about the color of the three stars? star 2 is white in color o star 2 is yellow in color star 1 and star 3 are yellow in color star 1 and star 3 are white in color

What is the mass of naoh that would have to be added to 500 ml of a solution of 0.20 m acetic acid in order to achieve a ph of 5.0?