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help pls! thank u (:

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Answer:

7.65 moles of silver are produced

Explanation:

Zinc, Zn, reacts with silver nitrate, AgNO3, as follows:

Zn + 2AgNO3 → Zn(NO3)2 + 2Ag

Where 1 mole of Zn reacts with an excess of AgNO3 to produce 2 moles of Ag

To solve this question we must convert the mass of Zn to moles and, using the chemical equation, we can find the moles of Ag as follows:

Moles Zn (Molar mass: 65.38g/mol):

250g Zn * (1mol / 65.38g) = 3.824 moles Zn

Moles Ag:

3.824 moles Zn * (2mol Ag / 1mol Zn) =

7.65 moles of silver are produced

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