Based on the reaction equation you provided, \( 2A + IB \rightarrow 3C + ID \), we can analyze the situation with the given masses of the reactants (2 grams of substance A and 3 grams of substance B).
To evaluate the options concerning the products:
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1 gram of substance B is left over: This can only be true if B is in excess during the reaction. However, without knowing the molar masses of A and B, we cannot determine if there is leftover B.
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2 moles of substance A are used: This statement addresses the amount used concerning its molar mass. Since we only have mass and no molar mass provided, we cannot confirm this.
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4 grams of products are produced: According to the law of conservation of mass, the total mass of the products must equal the total mass of the reactants. We started with a total of 2 grams of A + 3 grams of B = 5 grams of reactants. Therefore, the products must also total 5 grams. This option is false.
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4 moles of products are produced: Similar to the previous analysis, we cannot verify the moles of products without knowing the molar masses, so this statement cannot be confirmed.
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5 grams of products are produced: Since the mass of the reactants (5 grams) must equal the mass of the products, this statement is true.
So, based on the analysis, option 5 grams of products are produced is the correct answer.