Which are the most common magnetic elements?

Asuspension of yeast cells is being grown under anaerobic conditions such that glucose is degraded to ethanol and carbon dioxide. if one wishes to follow this process by monitoring the release of 14co2, at which positions in the glucose molecule would the 14c label need to be incorporated?

What is the scientific name for weight?

How many grams of sodium chloride are in 250ml of a 2.5m naci solution