Answer:
1. Buccal cavity (oral cavity) and the nasal passage opens into Pharynx. Pharynx opens into esophagus of the digestive system and opens into larynx of the respiratory system.
2. It is an organ which is found in both vertebrates and non-vertebrates. However, the structure may vary from species to species.
3. The word “Pharynx” is derived from the Greek words “Pharunx” or “Pharung”. Its plural form is pharynges.
Explanation:
The answer is <span>0.132606 amu.</span>
The mass defect (Δm) is the total mass of protons and neutrons minus the mass of the atom.
<span>mass of an oxygen-16 atom: 15.994914 amu
mass of a proton: 1.00728 amu
mass of a neutron: 1.00866 amu
</span>
An oxygen atom has 8 protons and 8 neutrons. Therefore:
Δm = 8 · 1.00728 + 8 · 1.00866 - <span>15.994914 = 8.05824 + 8.06928 - 15.994914 = 0.132606 amu
</span>
Isotopes
Atoms of the same element; number of protons remain the same, number of neutrons vary. Chemical properties remain the same. Atomic mass varies.
Na sodium with 11 neutrons = atomic mass of 22
With 22 neutrons the mass is 23.
Both have 11 protons in the nucleus.
Answer:
I'll give this a shot I think it's B!
Explanation:
