Ramendra C Mukerjee Solutions for Chapter: Molecular Weight, Exercise 1: PROBLEMS

In a Victor Meyer determination, $0.0926 \mathrm{g}$ of a liquid gives $28.9 \mathrm{mL}$ of gas, which is collected over water and measured at $16°\mathrm{C}$ and $753.6 \mathrm{mmHg}$ pressure. Calculate molecular weight and vapour density of the substance. (Aqueous tension at $16°\mathrm{C}=13.6 \mathrm{mmHg}$.)

A Dumas bulb of capacity $200 \mathrm{mL}$ weighs $22.567 \mathrm{g}$ at $120°\mathrm{C}$. When it is filled with vapours of a substance at $120°\mathrm{C}$ and $755 \mathrm{mm} \mathrm{Hg}$ pressure, it weighs $22.8617 \mathrm{g}$. Find the molecular weight of the substance.

$0^{°}\mathrm{C}=273 \mathrm{K} \mathrm{and} \mathrm{R}=0.082 \mathrm{atm} \mathrm{L} {\mathrm{mol}}^{-1}{\mathrm{K}}^{-1}$

give the answer up to one place of decimal.

$0.2704 \mathrm{g}$ of a substance when introduced into a Hofmann tube, generated $110 \mathrm{mL}$ of vapours at $99.6°\mathrm{C}$ and $747 \mathrm{mm} \mathrm{Hg}$ pressure. The height of mercury inside the tube was found to be $285.2 \mathrm{mm}$. Calculate the molecular weight of the substance. 

Report your answer up to four significant figures.

$0.607 \mathrm{g}$ of silver salt of a tribasic acid on combustion deposited $0.37 \mathrm{g}$ of pure silver. Calculate the molecular weight of the acid.

$0.304 \mathrm{g}$ of a silver salt of a dibasic acid left $0.216 \mathrm{g}$ of silver on ignition. Calculate its molecular weight.

$0.66 \mathrm{g}$ of platinichloride of a monoacid base left $0·150 \mathrm{g}$ of platinum on ignition. Calculate its molecular weight. $(\mathrm{Pt}=195)$

The chloroplatinate of a diacid base contains $39\%$ platinum. What is the molecular weight of the base? $(\mathrm{Pt}=195)$

A solution containing $3.00 \mathrm{g}$  of a monobasic organic acid was just neutralised by $40 \mathrm{mL}$ of $0.5 \mathrm{N} \mathrm{NaOH}$ solution. Calculate the molecular weight of the acid.