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 :

The molecular formula of hydrogen chloride gas and water vapours as determined using Avogadro's law is

The molecular formula of hydrochloric acid gas determined using Avogadro's law is _____.

Recall the value of Avogadro number used for the determination of molecular formula of a given gas using Avogadro's law.

The molecular formula of hydrochloric acid gas determined using Avogadro's law is $\mathrm{HCl}$.

Illustrate the determination of molecular formula of a given gas using Avogadro's law.

Describe method of determination of atomicity of elementary substances using Avogadro's law.

The _____ of an elementary substance is defined as the number of atoms of the element present in a molecule of that element.

Which of the following statements is known as the Berzelius Hypothesis?

The atomicity of ozone is two.

What is the atomicity of hydrogen, nitrogen and ozone gases?

What do you mean by atomicity of an elementary substances?

Berzelius hypothesis states that equal volumes of all gases under similar conditions of temperature and pressure contain an equal number of molecules. 

Write the statement of Berzelius hypothesis.

Berzelius hypothesis states that equal _____ of all gases under similar conditions of temperature and pressure contain an equal number of atoms. 

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)