How many moles of carbon dioxide are produced in the reaction between hydrochloric acid and calcium carbonat when 2 moles of HCI are used to start with?2HCl+CaCO 3 CaCl 2 +CO2 +H2O A.2
B. 3
C.1
D. 4

Explain the effects of nh3 and hcl on the cuso4 solution in terms of le chatelier's principle

In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. which postulate of kinetic molecular theory best explains how this is possible?

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.