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Solution: Write a chemical formula for each molecular model. (See Appe...

Question

Write a chemical formula for each molecular model. (See Appendix IIA for color codes.)

Video Transcript

Hey guys, so in this question we're trying to write the chemical formula based on the drawing that they provided. So the rule is that if the atom is shaded on the greenish-yellow colour, I'm going to put green yellow, it's going to represent the atom sulphur. Now, if it's shaded in the colour red that means that it's going to represent the atom oxygen. Now since we know which atom it represents, the next step is to count the number of shaded red atoms there are and the shaded green-yellow atoms there are.

So as you guys could see there's only one sulphur atom present because there's only one atom that's shaded in the greenish-yellow colour. So that means we're going to have 1 sulphur atom in the compound. Remember we don't put the one, it's just known that it's there so it's just imaginary. Next, how many red atoms are there? We have 1, 2, 3. So that means there's going to be 3 oxygens present in the compound and the way we write that is we write oxygen and the numbers 3 at the bottom. So based on the drawing, the compound will have the formula SO3. So once again the greenish-yellow colour represents the sulphur atom and the red colour represents the oxygen atom. See you guys soon.

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