Which Has Maximum Number Of Atoms?

Pressure is determined as force per unit area of the surface. The S.I unit of pressure, pascal, is as shown below:

                               1Pa = 1 Nm^–2

 If mass of air at sea level is 1034g cm^-2, calculate the pressure in pascal.

Determine the molecular formula of an oxide of iron in which the mass percent of iron and oxygen are 69.9 and 30.1 respectively. Given that the molar mass of the oxide is  (Atomic mass: Fe = 55.85, O = 16.00 amu)

A gaseous mixture contains oxygen and nitrogen in the ratio of 1:4 by weight. Therefore, the ratio of their number of molecules is

The total number of electrons in one molecule of carbon dioxide is

The largest number of molecules is in

When the same amount of zinc is treated separately with excess ofsulphuric acid and excess of sodium hydroxide, the ratio of volumes of hydrogen evolved is

 2.76 g of silver carbonate on being strongly heated yields a residue weighing

If 0.50 mole of BaCl₂ is mixed with 0.20 mole of Na₃PO₄, the maximum number of moles of Ba₃ (PO₄)₂ that can be formed is

How many moles of electron weighs one kilogram?