Use the bond energies provided to calculate LaTeX: \DeltaΔH for: 2 C2H2 + 5 O2 > 4 CO2 + 2 H2O C=C = 960kJ O=O 498 kJ C-H 412 kJ C=O 743 kJ O-H 463 kJ

In 1901, thomas edison invented the nickel-iron battery. the following reaction takes place in the battery. fe(s) + 2 nio(oh)(s) + 2 h2o(l) fe(oh)2(s) + 2 ni(oh)2(aq) how many mole of fe(oh)2, is produced when 5.35 mol fe and 7.65 mol nio(oh) react?

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?