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At STP, which 4.0-gram zinc sample will react fastest with dilute hydrochloric acid? (1) lump (3) powdered(2) bar (4) sheet metal
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At STP, which 4.0-gram zinc sample will react fastest with dilute hydrochloric acid? (1) lump (3) powdered(2) bar (4) sheet metal

User Juw
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A powdered zinc sample, because the surface area is the greatest when the zinc is powdered, which increases the rate of reaction.
User Yancy
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User Moumit
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