A plant virus is found to consists of uniform cylindrical particles of $150 A^{\circ}$ in diameter and $5000\;A^{\circ}$ long. The specific volume of the virus is $0.75\;cm^3/g$ If the virus is considered to be a single particle , find its molar mass.

Question

$(a)\;7.09 \times 10^8\;g \\ (b)\;7.09 \times 10^7\;g \\(c)\;6.09 \times 10^7\;g \\(d)\;7.09 \times 10^6 \;g $