It should be compared 'per 100g'. 100 grams is a fixed, known quantity - a 'serving' could be anything from a tablespoon to a bowl-full, depending on the individual consumer.
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The tenths column is the first column after the decimal point, so it is 2.
.003 would be in the thousandths column.
The 5 is in the tenths column.
You could be referring to data. In a column it is a field. In a row it is a record.
Usually a column chart, but it depends on what exactly you want to do and the nature of the data.
Bar charts are good for comparing related items. Answer: for Excel it is best known as a column chart.
The Business Week MBA column is a part of the Business Week newspaper and is a column all about what the MBA is, what it does, and updates information about it.
The vertebral column and skull is another description for the spinal column. See the related link for more information. The entire vertebral column consists of the skull, the 33 vertebrae and the ribcage.