How many particles of bacl2 reacted if 1.53 mol of it were consumed? a) 2.54 x 10–24 particles bacl2 b) 6.83 x 10–24 particles bacl2 c) 3.43 x 101 particles bacl2 d) 9.21 x 1023 particles bacl2

Atmospheric pressure is 1.00 atm, but air is only composed of 21.0% (by moles) oxygen. thus, the partial pressure of oxygen in air is less than 1.00 atm. what is the millimolar concentration of dissolved oxygen for a lake or stream under the partial pressure of oxygen and a temperature of 20 ∘c?