A friend wants to know whether her wedding ring is made of pure gold or of a mixture of gold and silver. a)Describe an investigation to answer her question.

b)Explain what is likely to be the most significant source of error in your answer.

The density of gold is 19.3g/cm and the density of silver is 10.5g/cm

Answerstatic electricity shock;

The chemical reactions lab we did is typically called a "copper plating lab,  because the acid solution cleaned the pennies and made the copper look shinier;   the acid solution cleaned the paperclips and made them look like pennies;   &   the copper from the pennies was removed, and then added to the paperclips. 

Iwould think it is temperature, silica, oxides (gases)

The answer is a your welcome