A solid is placed in a solution. Which observation most likely indicates that a chemical reaction has occurred?
The size of the solid has rapidly decreased.
The color of the solution has not changed.
The solid has bubbles forming on its surface.
The temperature of the solution stays the same
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The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?
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The volume of an unknown substance in a sealed glass jar is 50 milliliters. the volume of the jar is 200 milliliters. which state of matter could the substance be?
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A solid is placed in a solution. Which observation most likely indicates that a chemical reaction ha...
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