Explain hoow u will separat the mixture of irin filling ,sand and sawdust

Element before carbon on the periodic table

Is this correct if not can u correct me

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?