Which of the following categories of pressure-regulating devices uses a pitot tube and gauge to read pressure and automatically reduce flow?

Which of the following is true regarding the unit "mole"?

A) If the masses of two atoms differ, then a mole of one substance will weigh more than a mole of the other. B) Because the number of atoms in a mole is constant, one mole of any substance has the same weight as does one mole of any other substance. C) The unit "mole" uses the standard of one mole of carbon-12, because one mole of carbon-12 is the heaviest substance known. D) Both A and C are correct.

A client has a sucking stab wound to the chest. Which action should the nurse take first?

a) Draw blood for a hematocrit and hemoglobin level. b) Apply a dressing over the wound and tape it on three sides. c) Prepare a chest tube insertion tray. d) Prepare to start an I.V. line.