Equal masses of oxygen and ozone are present in a container at 298 K. The ratio of their partial pressures ($P_{O_2} : P_{O_3}$) is:

According to the Haber-Bosch process, the molar ratio of hydrogen to ammonia is:

A mixture of ${\rm{2}}{\rm{.3}}\,\,{\rm{g}}$ formic acid and ${\rm{4}}{\rm{.5}}\,\,{\rm{g}}$ oxalic acid is treated with conc. ${{\rm{H}}_{{\rm{2}}\,}}{\rm{S}}{{\rm{o}}_{\rm{4}}}$ . The evolved gaseous mixture is passed through ${\rm{KOH}}$ pellets weight (in g) of the remaining product at STP will be

If you have samples of 0.5 moles of water, 36 g of water, and 3.011 x 10²³ molecules of water, which sample has the greatest mass?

The apparatus in which standard solution is prepared is known as :

Which of these samples contains the fewest atoms?

Number of atoms in 558.5 g of Fe is (at . wt = 55.85)

Which one of the followings has maximum number of atoms ?

The number of moles of hydrogen molecules required to produce 20 moles of ammonia through Haber’s process is:

10g of which of the following substances contains the greatest number of atoms?

Oxygen and the oxide ion have the