What is the best classification for hydrogen bonds between 2 water molecules?

A. Intermolecular Force
B. Intramolecular Force
C. Covalent Bond
D. Ionic Bond

Option A. Intermolecular Force

Explanation:

Hydrogen bond is an intermolecular forces that arise when hydrogen of one compound is bonded to usually oxygen, nitrogen or fluorine in the other compound. In water molecule, the hydrogen bond exist between the hydrogen in 1 water molecule and the oxygen in the other water molecule.

2b2t

explanation:

2b2t

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.