Given the thermochemical equation, H2 (8) + Br2 (1) ► 2HBr(g), AH = -72.4 kJ/mol, calculate the amount of heat released when a kilogram of
H2 (g) is consumed in this reaction.

How does a hydroelectric power plant converts energy into energy.

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange

How does blood clotting prevent the entry of pathogens through cuts and wounds? answer asap,, this is due tomorrow. will mark as brainliest or whatever you call it : )