Bi2O3 (s) + 3 CO (g) → 2 Bi (s) + 3 CO2 (g) Datos:

S° Bi2O3 (s) = 151,5 J/mol K

S° CO (g) = 197,7 J/mol K

S° Bi (s) = 56,7 J/mol K

S° CO2 (g) = 213,7 J/mol K

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100mg magnesium reacts with 20ml of 1.0m hcl

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.

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture