How many moles of H are present in 2.50 moles of benadryl?

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm