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The drawing shows a sulfur dioxide molecule. It consists of two oxygen atoms and

ID: 2192091 • Letter: T

Question

The drawing shows a sulfur dioxide molecule. It consists of two oxygen atoms and a sulfur atom. A sulfur atom is twice as massive as an oxygen atom. Using this information and the data provided in the drawing, find (a) the x coordinate and (b) the y coordinate of the center of mass of the sulfur dioxide molecule. Express your answers in nanometers (1 nm = 10-9 m).

The drawing shows a sulfur dioxide molecule. It consists of two oxygen atoms and a sulfur atom. A sulfur atom is twice as massive as an oxygen atom. Using this information and the data provided in the drawing, find (a) the x coordinate and (b) the y coordinate of the center of mass of the sulfur dioxide molecule. Express your answers in nanometers (1 nm = 10-9 m).

Explanation / Answer

The molecule is symmetrical about the y-axis. Therefore xcmx = 0 as the centre of the mass lies on the y axis.
Given that, the mass of the two oxygen atoms equals the mass of the sulphur atom. Therefore, the centre of mass will be half-way between them.
Therefore, ycmy= 1/2 of sin30*0.143
= 0.03575nm

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