Х Determine the number of grams of MgBr2 in 2.5 x 1019 molecules of MgBr2. (Atomic
weight of Mg = 24.31 and Br = 79.91).
=
Note: 10^-2 means 10-2
O 4.6 x 10^21
O 7.6 x 10^-3 g
O 8.2 x 10^40
0 4.2 x 10^-5
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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.