At 25°C, the following heats of reaction are known: 2C2H2 + 5O2 → 4CO2 + 2H2O ΔH = –2600.0 kJ C + O2 → CO2 ΔH = –394 kJ 2H2 + O2 → 2H2O ΔH = –572 kJ At the same temperature, calculate ΔH for the following reaction: 2C + H2 → C2H2 ΔH = ?

Ammonia and oxygen react to form nitrogen monoxide and water, like this: 4nh3 (g) + 5o2 (g) → 4no (g) + 6h2o (g) also, a chemist finds that at a certain temperature the equilibrium mixture of ammonia, oxygen, nitrogen monoxide, and water has the following composition: compound pressure at equilibrium nh3 65.1atm o2 31.3atm no 62.7atm h2o 65.8atm compound pressure at equilibrium nh3 65.3 atm o2 7.79 atm no 12.1 atm h2o 65.8 atm calculate the value of the equilibrium constant kp for this reaction. round your answer to 2 significant

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)