Question

A molecule of water is made up of 1 atom (O) of hydrogen

consists of 2 oxygen atoms (H). The bonds between the atoms are shown in the figure

shown schematically. The angle between the two joints is 106 °. The length of each link

taking into account 0.1 nm. Where is the center of molecular mass? Get the source of the number on O.

Answer 1

$$x=0.1\cos 53=0.06\ nm,\\y=0.1\sin 53=0.08\ nm$$

$$\bold{r_1=0.06i+0.08j,r_2=0.06i-0.08j,r_3=0}$$

$$\bold{r_{CM}}=\frac{(1.008)(\bold{0.06i+0.08j+0.06i-0.08j})}{2(1.008)+15.999}\\=(6.71\cdot10^{-3})\bold{i}\ nm$$