1. The mass of a rock sample is 5.663 g. To determine its density, it is immersed in water in a graduated cylinder. Initial volume of water in the graduated cylinder was 30.0 mL. Final volume of water + sample is 31.5 mL. Determine the density of the rock.

2. The blood analysis of a patient shows 35 mg iron/ dL of blood. Assuming an adult person has 5.0 L of blood, determine the total mass of iron in grams present in the patients body.