Given the following reaction: h2(g)+i2(s) → 2hi(g) with a ∆hof 52. 9 kj. What is the change in enthalpy for the following reaction: hi(g) → 1 2h2(g)+ 1 2i2(s)? express your answer in kj.

Technological solutions have good bad effects. what is one bad effect of spraying a chemical pesticide on crops

Summarize the work of famous environmental scientists of the past.

Tortoise shells and snail shells are similar in function: they protect the organism from predators. based on a comparison of the organisms in the images, what can you conclude? 1. tortoises and snails have homologous organs, and they’re evolutionarily related. 2. tortoises and snails have homologous organs, and they belong to same species. 3. tortoises and snails have analogous organs, and they belong to the same species. 4. tortoises and snails have analogous organs, and they don’t belong to the same species. 5. tortoises and snails have analogous organs, and they aren’t evolutionarily related.