a certain gas occupies 5 dm³ at 24 °C and 15 cm Hg. Calculate the pressure of the gas if the volume is halved and the temperature is raised to 200°C.

Use the standard enthalpies of formation for the reactants and products to solve for the δhrxn for the following reaction. (the δhf of c2h4 is 52.26 kj/mol, co2 is -393.509 kj/mol, and h2o is -241.818 kj.) c2h4 (g) + 3o2(g) 2co2 (g) + 2h2o(g) δhrxn = the reaction is .

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

What term is missing from the central region that describes hypotheses, theories, and laws? popular predictable mathematical falsifiable