What is the molar mass of a gas that has a rate 1.86 time slower than
fluorine?

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.

Amixture that has two or more substances that are spread out evenly is called a. compound b. heterogeneous c. substance d. homogeneous