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1. What is the pressure of a sample of 35g of nitrogen gas in a 5.6L container at 90oC? . 2.What is the shape of the carbonate ion, (CO3)2-? a. What is the total number of valence electrons? b. Identify the central atom c. How many electron domains are around the central atom? d. What is the molecular geometry of the carbonate ion? e. Is it a polar or non-polar molecule? 3. Calculate the amount of heat (cal) necessary to convert 34g of ice at -3oC into liquid water at 25oC.

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