Need answer ASAP. Which pair of compounds has the same empirical formula?
A) C3H8 and C3H
B) C2H2 and C2H
C) C4H10 and C6H
D) C4H10 and C2H5

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out

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.

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver