Achemical equation for this problem ..:

- silver objects (ag) darken because the silver reacts with the sulfur (s) found in the air forming a layer of silver sulphide (ag2s)

What sources of error may have contributed to the percent yield not being 100 percent? think about things that may have led to inaccurate measurements or where mass of the product could have been lost if this experiment was conducted in a physical laboratory.