13. For the following reaction, use Hess's law to calculate AGʻrxn given the information below. Reaction: CO(g) + C(s) + 1/2 O2(g)
Gºrxn = ?
Given: CO2(g) → C(s) + O2(g)
CO(g) + 1/2 O2(g) + CO2(g)
AGʻrxn = +394.4 kJ
AGºrxn = -257.2 kJ

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.

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

In the reaction between a crushed antacid tablet and vinegar what gas is emitted