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Question

Sodium chloride (NaCl) reacts with silver nitrate (AgNO3) to produce silver chloride (AgCl) and sodium nitrate (NaNO3). The law which satisfies this equation is ___________________ .

A
conservation of mass
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B
conservation of energy
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C
newton's law
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D
dalton's law
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Solution

The correct option is A conservation of mass
Reaction:
NaCl+AgNO3AgCl+NaNO3
Mol : 1 mol 1 mol 1 mol 1 mol
Mass : 58.5 g 170 g 143.5 g 85 g

Total mass of reactants is equal to the total mass of products. This is the law of conservation of mass.

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