Answer
a) Mixture
b) Mixture
c) Element
d) Compound
Work Step by Step
a) Sterling silver is a metal alloy of silver (Ag) and other metals like copper (Cu); hence it's a mixture.
b) It's a mixture of carbon dioxide dissolved in water.
c) Element of group 6 on the sixth period of the periodic table.
d) Compound by the mame of acetylsalicylic acid.
