Which of the following equations support the law of conservation of mass? 8.5F I - 2 Fe2O3 + 3 C → 4 Fe + 3 CO2

II - SO2 + O2 + 2 H2O → 4 H2SO4

III - 2 Mg + HCl → MgCl2 + H2

IV - 2 SO2 + O2 + 2 H2O → 2 H2SO4

A I only

B I and IV

C II and III

D I, III, and IV

Red blood cells are responsible for transporting oxygen in the blood. people with sickle cell anemia were born with a defective gene that results in sickle-shaped red blood cells. individuals with the disease often suffer pain in their extremities due to the build-up of these cells causing blockages in the blood vessels. the shape of the blood cells also reduces the amount of oxygen transported in the blood.