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HW708 - CHEM 1406 Harman HW#7 due March 10/11(in class 1 A...

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CHEM 1406, Harman HW #7 due March. 10/11 (in class) 1) 1
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A chemical equation is balanced when A)
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the total number of molecules is the same in reactants and products. B)
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the total number of ions is the same in reactants and products. C)
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the sum of the coefficients of the reactants is equal to the sum of the coefficients of the products. D)
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the number of atoms of each element is the same in reactants and products. E)
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the charge on each atom is the same in reactants and products. 2)
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Which of the followin g gives the balanced equation for this reaction? K 3 PO 4 + Ca(NO 3 ) 2 Ca 3 (PO 4 ) 2 + KNO 3 A)
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KPO 4 + CaNO 3 + KNO 3 B)
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K 3 PO 4 + Ca(NO 3 ) 2 Ca 3 (PO 4 ) 2 + 3KNO 3 C)
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2K 3 PO 4 + Ca(NO 3 ) 2 Ca 3 (PO 4 ) 2 + 6KNO 3 D)
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2K 3 PO 4 + 3Ca(NO 3 ) 2 Ca 3 (PO 4 ) 2 + 6KNO 3 E)
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K 3 PO 4 + Ca(NO 3 ) 2 Ca 3 (PO 4 ) 2 + KNO 3 3)
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Which of the followin g correctly gives the best coefficients for the reaction below? N 2 H 4 + H 2 O 2 N 2 + H 2 O A)
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1, 1, 1 ,1 B)
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1, 2, 1, 4 C)
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2, 4, 2, 8 D)
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1, 4, 1, 4 E)
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2, 4, 2, 4 4)
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What coefficie nt is placed in front of O 2 to complete the balancing of the following equation? C 5 H 8 + ? O 2 5CO 2 + 4H 2 O A)
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