The peak pressure on a ventilator reads 40 cm H2O. What is the ...

[OSWALD]

The peak pressure on a ventilator reads 40 cm H2O. What is the equivalent pressure in mm Hg?
 
  a. 37.0 mm Hg
  b. 29.6 mm Hg
  c. 68.3 mm Hg
  d. 4.9 mm Hg

Question 2

In International System (SI) units, what is any quantity of matter that contains 6.023  1023 at-oms, molecules, or ions?
 
  a. Pound (lb)
  b. Gram (g)
  c. Ounce (oz)
  d. Mole (mol)

[kishoreddi]

Answer to Question 1

ANS: B
Because of mercury's high density (13.6 g/cm3), it assumes a height that is easy to read for most pressures in the clinical range. Water columns can also be used to measure pressure (in cm H2O), but only low pressures. Because water is 13.6 times less dense than mercury, 1 atm.

Answer to Question 2

ANS: D
One mole of a gas, at a constant temperature and pressure, should occupy the same volume as 1 mol of any other gas. This ideal volume is termed the molar volume.