A cube-shaped nanoparticle has sides of length 50 nm. Calculate the surface area to volume ratio for this nanoparticle. Use the equation: ratio = surface area ÷ volume Surface area to volume ratio – 7553

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1. Surface area = 6×502=15 Volume = 503=125 000
   Surface area to volume ratio = 15 000÷125 000=0.12
   So, the ratio is 0.12:1 or 1:8.3

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