Brass is an alloy of copper and zinc. the two metals are melted, mixed, and then solidified. how would you best classify brass? a) homogeneous mixture b) heterogeneous mixture c) pure substance: mixture d) pure substance: compound

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work

Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.