Mg + 2HCl ⟶ MgCl2 + H2 If 2.26 moles of HCl are reacted, how many grams of magnesium were used in the reaction?

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b

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.

List four observations that indicate that a chemical reaction may be taking place