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Posted by on Monday, January 26, 2009 at 5:24pm.

1. How do you know that NO2 (with a negative charge 1) is an anion and not ionic compound?

2. What are the SI standard units for length and mass? Why ins't there a standard SI unit for volume?

  • chemistry - , Monday, January 26, 2009 at 5:33pm

    Compounds don't have charges.

    meter, kilogram. The standard unit of volume is m^3

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