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

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)

4.4 g of CO_(2) and 2.24 L H_(2) and STP are mixed in a container. The total number of molecules present in the container will be

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.

NH_3 , gas at STP is kept in a cylinder of volume 5600mL. a) How many moles of NH_3 , is present in the cylinder? b) Calculate the mass of gas in the cyclinder. c) Find the number of molecules in the gas calculate the number of atoms in it. (Hint: Atomic mass, N=14, H-D)

Fill the cylinder with a little more gas. Does the number of molecules increase or decrease now ?

Calculate the total preśsure in a '10 L' cylinder which contains '0: 4 g' of helium, '1.6 g' of oxygen and '1.4 g' of nitrogen at '27^circ C'. Also calculate the partial pressure of helium gas. in the cylinder. Assume ideal behaviour.for gases?

A cylinder filled with CO gas, at STP has volume of 11200L. a) Calculate the no.of moles of CO in the cylinder? b) Find the no.of atoms?

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