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A plant virus is found to consist of uniform cylindrical particle for 150 A in diameter A long . The specific volume of virus is 0.75 cm 3 /gm . If the virus is considered to be a single particle find its molarity
Diameter of virus (d) = 150 oALength of virus =5000 oASpecific volume =0.75 cm3/gVolume of a virus = πr2l = 3.14 x [(150/2) x 10-8]2 x 5000 x 10-8 = 8.8312 x 10-17 cm3Mass of 1 virus = 0.884 *10-16/0.75 g= 1.178 * 10-19 g∴ Mol. wt. of virus = = 1.178 * 10-19 * 6.02 * 1023= 7.09 * 1078.8312 x 10−170.75=1.17751.1775 ×10−16 ×6.023 × 1023 =7.0920 × 107
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