Use the activity series to predict the half-reaction that occurs at the anode and the half-reaction that occurs at the cathode of a voltaic cell for the following combination of half-reactions. [The notation Cr(s)/Cr2 (aq) used below indicates the components of one of the half cells: Cr metal electrode placed in an aqueous solution of Cr2 (aq)].
Cr(s)/Cr2 + (aq) and Ag(s)/Ag + (aq)Anode:Cathode:

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks.energy was destroyed inside the blocks.energy was absorbed into the blocks from outside the system.energy was transferred from the warmer block to the cooler block.

Read the claim. breakfast is an important meal. it jump starts the body’s process of using calories to break down food. appetite can decrease with age, but going too long without eating causes metabolism to slow down. current research shows that incorporating legumes such as lentils and chickpeas into meals boosts metabolism for twenty-four hours. who might benefit from this claim? people who have a fast metabolism stores that sell exercise equipment people who take vitamin supplements grocery stores that sell legumes