Really need the answers fast! using the diagram above, answer the following questions: true or false. the arrow labeled c represents a transfer of chemical energy to mechanical energy. explain why this is true or false. true or false. the arrow labeled a represents a transfer of solar energy to chemical energy. explain why this is true or false. which arrow or arrows represent a release of carbon dioxide? what process is occurring at the arrow(s) you selected? which arrow or arrows indicate a process that cycles carbon from living or nonliving organisms? describe the process or processes you selected. which arrow or arrows represent reactions that demonstrate a conservation of mass and energy? explain your answer.

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Consider three unlabeled bottles, each contain small pieces of one of the following metals. - magnesium - sodium - silver the following reagents are used for identifying the metals. - pure water - a solution of 1.0 molar hcl - a solution of concentrated hno3 (a) which metal can be easily identified because it is much softer than the other two? describe a chemical test that distinguishes this metal from the other two, using only one of the reagents above. write a balanced chemical equation for the reaction that occurs. (b) one of the other two metals reacts readily with the hcl solution. identify the metal and write the balanced chemical equation for the reaction that occurs when this metal is added to the hcl solution. use the table of standard reduction potentials (attached) to account for the fact that this metal reacts with hcl while the other does not. (c) the one remaining metal reacts with the concentrated hno3 solution. write a balanced chemical equation for the reaction that occurs. (d) the solution obtained in (c) is diluted and a few drops of 1 m hcl is added. describe what would be observed. write a balanced chemical equation for the reaction that occurs.

What is the molar mass of the anhydrous compound? answer using four significant figures. 36.02 g/mol 120.15 g/mol 156.12 g/mol