According to the institute of medicine of the national academy of sciences, the physical activity level category of very active is the equivalent of walking at a rate of 3-4 miles per hour daily for how many miles

17

Explanation:

The Institute of Medicine of the National Academy of Sciences states that the Physical Activity Level Category of very active is the equivalent of walking at a rate of 3-4 miles per hour daily for 17 miles

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.