67.2L of Carbon dioxide gas is filled in a cylinder at STP: Calculate the mass of `CO_2` present in it. (Atomic mass-C=12,O=16)

67.2L of Carbon dioxide gas is filled in a cylinder at STP: Calculat the numbe rof molecules pres-ent in the cylinder.

Calculate the molar mass of CO_2 .

Calculate the no. of moles in 220g CO_2 Hint: Atomic mass (C=12,0=16)

Calculate the mass of one 12_C atom in gram.

A definite mass of CO_2 gas at STP has a volume of 67.2 Litre in a cylinder. a) Calculate the mass of CO_2 (Atomic mass, C - 12, O =16) b) Calculate the number of molecules of CO_2 in the cylinder.

Calculate the mass of 112 L CO_2 gas kept at STP (molecular mass=44).

One mole of an ideal gas occupies 22.4L at STP. Calculate the number of atoms present in the above sample.

One mole of an ideal gas occupies 22.4L at STP. Calculate the mass of 11.2L of oxygen gas at STP.

Iron (Il) oxide crystallise in cubic structure with unit cell edge of 5.0Å If the density of the oxide is 3.8 g cm-3 . Calculate the no. of Fe^2+ and O_2- present in each unit cell. [atomic mass of Fe=56, O=16]

Calculate the number of molecules present in 56mL of CO_2 at STP.