[40 points] How do I find the average atomic masses of these?

14.02 amu

Explanation:

The following data were obtained from the question:

Isotope A (N–13):

Mass of A = 13 amu

Abundance (A%) = 28.97%

Isotope B (N–14):

Mass of B = 14 amu

Abundance (B%) = 41.04%

Isotope C (N–15):

Mass of C = 15 amu

Abundance (C%) = 29.97%

Average atomic mass of nitrogen =?

The average atomic mass of nitrogen can be obtained as illustrated below:

Average = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]

= [(13 × 28.97)/100] + [(14 × 41.04)/100] + [(15 × 29.97)/100]

= 3.77 + 5.75 + 4.50

= 14.02 amu

Thus, the average atomic mass of nitrogen is 14.02 amu

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

i would say b

explanation:

but i think i would need more information than that