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Nail polish remover containing acetone was spilled in a room 7.63 m 5.68 m *5.16 m.
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Measurements indicated that 3,450 mg of acetone evaporated. Calculate the acetone concentration in micrograms per cubic meter.

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.