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    Science: Chemistry Quiz
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The masses of the reactants and products are always ____. acidic
An electron has an ____ charge and smaller mass than a proton. attract
Oil floats on water because water is ____ than oil. denser
All heterogeneous mixtures can be ____ by physical means. equal
Positive and negative charges ____ each other. floats
A solution with a pH less than 7 is ____. neutral
Ice ____ because its density is less than liquid water. opposite
At 25°C, pure water has a pH of 7 and therefore is ____. separated

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