A biologist measures the pH of a fluid sample taken from the stomach and finds i

Question

A biologist measures the pH of a fluid sample taken from the stomach and finds it is _____ and concludes it is acidic. A) 3.75 B) 7.8 C) 8.5 D) 9.5 The Atomic number of Sodium = 11, and the atomic mass (weights) of Sodium = 23. This Sodium has ____ protons and ____ neutrons? A) 11: 23 B) 11: 12 C) 12: 11 D) 23: 11 Normal (Physiological) saline used in drips has a NaCI concentration of _____ A) 3% B) 2% C) 0.9% D) 0.02% A red blood cell placed into a ____ solution will undergo A) hypotonic B) hypertonic C) isotonic D) None of the above

Explanation / Answer

9)

Na Atomic number is 11 and Atomic mass is 23

Number of protons=Z=Atomic number=11

Number of Neutrons= Mass number-Atomic number

   =23-11

   Number of neutrons=12

10)

Normal saline has a NaCl has concentration of 0.9%

11)

A red blood cell placed in a hypertonic solution will shrink in a process called crenation

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