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Communication Science
Audiology
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1
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The law of conservation of mass
the total mass of the products of a reaction equal to the total mass of the reactants atoms cant be created or destroyed
2
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Why do we balance chemical equations
during a chemical reaction atoms of the reactants are rearranged to form products but the atom stays the same
3
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How to know a chemical change happend
1. energy is released/consumed
2. unexpected colour changes
3. a gas is produced (new odour)
4. a precipate forms
4
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Experiment that can prove reactivity of metal
Be able to compare the reacitivity of the metals the one that has a reaction means that metal is more reactive
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