Pure gold (24 kt) is a soft metal, so jewelers often add other metals (silver or copper) to make gold rings harder (and less expensive). when the metals are combined a chemical reaction does not occur. are these rings mixtures or compounds? explain your answer

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.