3.4 - conservation of mass
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what does the conservation of mass state?
no atoms are created or destroyed, only the bonds between them change
2
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why might the mass appear to increase in a reaction?
one of the reactants is a gas
3
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why might the mass seem to decrease in a reaction?
one of the products is a gas
4
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how can an uncertainty in mass be avoided?
carry out experiments in a sealed container to trap the air
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