Atomic mass is determined my the number of protons plus the number a) electrons b)neutrons c)charges d)atoms

Why was the sample heated in step 5? describe the chemical principles involved in the reasoning behind this step?

What can be found in every skeletal muscle? a. nerves, bones, cartilage, and connective tissue b. tendons, cartilage, nerves, and blood vessels c. muscle fibers, nerves, connective tissue, and blood vessels d. tendons, nerves, blood vessels, and bones

How do living things obtain phosphorus