Calculate ΔS∘rxn for the following reaction. The ΔS∘ for each species is shown below the reaction. C2H2(g) + 2H2(g) → C2H6(g)
S∘(J/mol⋅K) 200.9 130.7 229.2

A) -159.0 J/K
B) -233.1 J/K
C) +233.1 J/K
D) 303.3 J/K
E) 560.8 J/K

The diagram shows the structures of horse and cat forelimbs. what does the diagram suggest about the evolutionary relationship between these two mammals? a. they have homologous structures, indicating a common ancestor. b. they have analogous structures, indicating a common ancestor. c. they have homologous structures, indicating that they do not have a common ancestor. d. they have analogous structures, indicating that they do not have a common ancestor.

Which of these conditions most likely produces an unstable isotope?

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.