Describe how ethanol can be boiled safely

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How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

As light moves from one material into the next, which of the following affects how much the light waves will refract, or bend? angle at which the ray strikes the medium color of the material density of the material temperature of the light wave