If we consider that $1/6$, in place of $1/12$ mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will:

$1 \mathrm{g}$ of dry green algae absorbs $4.7\times {10}^{-3}$ moles of ${\mathrm{CO}}_2$ per hour by photosynthesis. If the fixed carbon atoms were all stored after photosynthesis as starch, ${\left({\mathrm{C}}_6{\mathrm{H}}_{10}{\mathrm{O}}_5\right)}_{\mathrm{n}}$, how long (in hours) would it take for the algae to double their own weight assuming photosynthesis takes place at a constant rate?

Round-off your answer to two places of decimal.

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

If the answer is of type $\mathrm{y}\times {10}^7 \mathrm{g} {\mathrm{mol}}^{-1}$, report the value of $\mathrm{y}$ correct up to two places of decimals.

When a mixture of $\mathrm{NaBr}$ and $\mathrm{NaCl}$ is repeatedly digested with sulphuric acid, all the halogens are expelled and ${\mathrm{Na}}_2{\mathrm{SO}}_4$ is formed quantitatively. With a particular mixture, it was found that the weight of ${\mathrm{Na}}_2{\mathrm{SO}}_4$ obtained was precisely the same as the weight of $\mathrm{NaBr}-\mathrm{NaCl}$ mixture taken. Calculate the ratio of the weights of $\mathrm{NaCl}$ and $\mathrm{NaBr}$ in the mixture.

Give the final answer up to two places of decimal.

$0.096 \mathrm{g}$ of stannic chloride gave $25.84 \mathrm{mL}$ of its vapour at $120°\mathrm{C}$ and $350 \mathrm{mm}$ pressure. If the chloride contains $54.6\%$ of chlorine and tin has the valency equal to $4,$ what will be the atomic weight of tin?

Round-off the answer to the nearest integer.