You're discussing a forensic crime scene show with your roommate, who insists that fingerprints are left behinsd due to the sebum on our fingertips. What do you tell him?

True

Explanation:

Sweat is not the only source of lipids found in fingerprints, however. Sebaceous glands on your face and scalp secrete an oily sub- stance known as SEBUM, which keeps your skin waterproof. ... Many factors can contribute to the quality of a fingerprint left behind.

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.

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