For D-mannose calculate the number of isomers with (name and structures)

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sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.

i'm wiling to try and you : )