1. Select three (3) from the following energy resources: a. Fossil Fuen b. Electrochemical Cells c. Geothermal d. Hydroelectric e. Wind f. Solar Cells g. Biomass 2. After choosing, research and answer the following questions in essay form. a. How is that type of energy resource being harnessed? b. What are the advantages and disadvantages of using hydroelectric energy? You may answer in terms of efficiency of use, availability, hazards, environmental effect, price, etc

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.

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons

Which are forms of frozen water? check all that apply. dew frost hail rain sleet