PLEASE HELP!! ANSWER ALL QUESTIONS 1. 4 Fe + 3 O2 → 2 Fe2O3

What are the products? What are the reactants?

How many oxygen atoms are on the right side of the equation (remember- multiply the coefficient times the subscript).

How many oxygen atoms are there on the reactant side? (same hint as the question above).

Define the apical impulse and describe its normal location, size, and duration. which abnormal conditions may affect the location of the apical impulse? explain the mechanism producing normal first and second heart sounds. describe the effect of respiration on the heart sounds. describe the characteristics of the first heart sound and its intensity at the apex of the heart and at the base. describe the characteristics of the second heart sound and its intensity at the apex of the heart and at the base.

The arrows in the illustration point to

Select the correct answer. what does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms