Amolecule with a central atom and two bonded atoms is bent with a bond angle of 105◦ . assuming the central atom satisfies the octet rule, how many lone pairs does it have?

2 lone pairs

Explanation: this is clearly a water molecule in which two hydrogen atom is bonded to one oxygen atom.

Please see attachment for explanation

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.