Laws of Chemical Combination

The molecular weight of ${\text{O}}_2$ and ${\text{S}\text{O}}_2$  are $32$ and $64$ respectively. At $15^o\text{C}$ and $150$ mm of Hg pressure, one litre of ${\text{O}}_2$ contains ‘N’ molecules. The number of molecules in two litres of ${\text{S}\text{O}}_2$ under the same conditions of temperature and pressure will be :

Tin metal reacts with hydrogen fluoride to produce tin ($\mathrm{II}$) fluoride and hydrogen gas, according to the following balanced equation:

$\mathrm{Sn}\left(\mathrm{s}\right)+2\mathrm{HF}\left(\mathrm{g}\right)\stackrel{ }{\to }{\mathrm{SnF}}_2\left(\mathrm{s}\right)+{\mathrm{H}}_2\left(\mathrm{g}\right)$

How many moles of hydrogen fluoride are required to react completely with $75.0 \mathrm{g}$ of tin?

Hydrogen sulphide gas burns in oxygen to produce sulphur dioxide and water vapour: $2{\mathrm{H}}_2\mathrm{S}\left(\mathrm{g}\right)+3{\mathrm{O}}_2\left(\mathrm{g}\right)\stackrel{ }{\to }2{\mathrm{SO}}_2\left(\mathrm{g}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)$. What mass of oxygen gas is consumed in a reaction that produces $4.60 \mathrm{mol}$ of sulphur dioxide?

When $10 \mathrm{mL}$ of propane (gas) is combusted completely, the volume of ${\mathrm{CO}}_2\left(\mathrm{g}\right)$ obtained in similar condition is:

${\mathrm{H}}_2\mathrm{S}$ contains $94.11\%$ sulphur; ${\mathrm{SO}}_2$ contains 50% oxygen and ${\mathrm{H}}_2\mathrm{O}$ contains $11.11\%$ hydrogen. Thus, 

Two substances $\mathrm{I}$ and $\mathrm{II}$ of carbon and oxygen have respectively $72.73\%$ and $47.06\%$ oxygen. Hence, they follow:

The volume of one mole of a gas is called _____ .

'The matter can neither be created nor destroyed but one form of matter can be converted into other' the said law is _____ law of thermodynamics.(first/second)

An electric discharge is passed through a mixture containing $50 \mathrm{ml}$ of ${\mathrm{O}}_{2( \mathrm{g})}$ and $50 \mathrm{ml}$ of ${\mathrm{H}}_{2( \mathrm{g})}$. The volume of the product $\left({\mathrm{H}}_2\mathrm{O}\right)$ formed at $110°\mathrm{C}$ will be. (Identical conditions of temperature and pressure):

Potassium chloride contains $52\%$ of $\mathrm{K}$, potassium iodide contains $23.6\%$ of $\mathrm{K}$ and iodine monochloride contains $77.8\%$ of $\mathrm{I}$.  The given information illustrates which of the followin laws?

Given $3\mathrm{g}$ of carbon reacts with $1\mathrm{g}$ of hydrogen to form ${\mathrm{CH}}_4$ and $8\mathrm{g}$ of oxygen reacts with $1\mathrm{g}$ of hydrogen to form ${\mathrm{H}}_2\mathrm{O}$. Similarly, $12\mathrm{g}$ of carbon reacts with $32\mathrm{g}$ of oxygen to form carbon dioxide. In both cases the ration of carbon and oxygen is 3 : 8. Which of the following laws illustrate the given example?

Which of the following compounds verify Law of Reciprocal Proportions?

In water, the proportion of oxygen and hydrogen by mass is:

Two oxides of metal contain $36.4 \mathrm{and} 53.4$ percent of oxygen by mass respectively. If the formula of the first oxide is ${\mathrm{M}}_2\mathrm{O}$, then that of the second oxide is 

$100 \mathrm{g}$ of ethylene polymerizes to polythene according to the equation:
$\mathrm{n} {\mathrm{CH}}_2={\mathrm{CH}}_2\to {\left({\mathrm{CH}}_2-{\mathrm{CH}}_2\right)}_{\mathrm{n}}$
The mass of polythene produced will be

Two oxides of metal contain $36.4 \mathrm{and} 53.4$ percent of oxygen by mass respectively. If the formula of the first oxide is ${\mathrm{M}}_2\mathrm{O}$, then that of the second is

Which of the following law is always applicable to a chemical process?

The Following data are obtained when dinitrogen and dioxygen react together to form different compounds.
 

$20.8 \mathrm{g}$ of $\mathrm{B}\mathrm{a}\mathrm{C}{\mathrm{l}}_2$ on reaction with $9.8 \mathrm{g}$ of ${\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4$ produces $7.3 \mathrm{g}$ of $\mathrm{H}\mathrm{C}\mathrm{l}$ and some amount of $\mathrm{B}\mathrm{a}\mathrm{S}{\mathrm{O}}_4$. The amount in grams of $\mathrm{B}\mathrm{a}\mathrm{S}{\mathrm{O}}_4$ formed is

How many g atoms of S are present $\mathrm{ }\mathrm{i}\mathrm{n}\mathrm{ }4.9\mathrm{ }\mathrm{g}\mathrm{ }\mathrm{ }{\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4$ ?