Problem 53E

Further Applications of the Ideal-Gas Equation (Section)

(a) Calculate the density of NO2 gas at 0.970 atm and 35 °C. (b) Calculate the molar mass of a gas if 2.50 g occupies 0.875 L at 685 torr and 35 °C.

Elements of Statistics – Chapter 6 Notes Key Points Density Curves Normal Distribution Standard Normal Curve Standard Normal Table Density Curve A fitted curve in regard to distribution Is ALWAYS ON or ABOVE the horizontal axis Total area under a density curve is always equal to 1 o Density Histogram To determine the density of a class, take the relative frequency and divide by the width of class. AREA = DENSITY x WIDTH Normal Distribution A variable is “normally distributed” if its distribution has the shape of a symmetric curve. o Characterized by its Mean, , and a Standard Deviation, o The Mean