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

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

What is one affect on the australian environment due to the introduction of non-native european rabbits

Describe the structure of a phospholipid