Which property of the water molecule causes two water molecules to be attracted to each other?

Hydrogen Bonding

Explanation:  Hydrogen Bonding is that kind of forces of attraction which can only be present in the molecules having electronegative atom and the hydrogen atom attached to it.

Thus water molecules have both Oxygen atom as the electronegative atom and hydrogen attached to electronegative atom O.

Thus one H atom of one water molecule forms hydrogen bond with oxygen atom of another molecule .

And these hydrogen bonds are weaker than the normal covalent bonds.

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).