What is the molar mass of sulfur hexafluoride gas if the density is 22.4g/l at stp?

The polymer used for the nonstick surface of cooking utensils is 24.0%c and 76%f by mass. what is the empirical formula of this polymer?

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth