Calculate the enthalpy for this reaction: 2c(s) + h2(g) > c2h2(g) δh° = kj given the following thermochemical equations: c2h2(g) + (5/2)o2(g) > 2co2(g) + h2o(ℓ) δh° = -1,123 kj c(s) + o2(g) > co2(g) δh° = -340 kj h2(g) + (1/2)o2(g) > h2o(ℓ) δh° = -211 kj

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

The following reaction shows the products when sulfuric acid and aluminum hydroxide react. al(oh)3 + h2so4 → al2(so4)3 + h2o the table shows the calculated amounts of reactants and products when the reaction was conducted in a laboratory. sulfuric acid aluminum hydroxide initial amount of reactant 40 g 15 g theoretical yield of water from reactant 14.69 g 10.38 g what is the approximate amount of the leftover reactant? 11.73 g of sulfuric acid 10.33 g of sulfuric acid 11.12 g of aluminum hydroxide 13.67 g of aluminum hydroxide

2. what two items do autotrophs take from the environment to produce their food? 3. what are the two items that are released during transpiration from leaves? 4. what are the two membranes of the system? a.what are the two stages of photosynthesis? what are the two parts of photosynthesis?