Which of the following is a covalent molecule ( select all that apply ) ( please answer asap !)

Option 1. H2O

Explanation:

Water (H2O), like hydrogen fluoride (HF), is a polar covalent molecule. ... The unequal sharing of electrons between the atoms and the unsymmetrical shape of the molecule means that a water molecule has two poles - a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole (side).

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.