A Gas Mixture Contains 50% Helium And 50% Methane By Volume. What Is The Percent By Weight Of Methane In The Mixture?

A compound has haemoglobin like structure. It has one Fe. It contain4.6% of Fe. The approximate molecular mass is

In Haber process, 30 litre of dihydrogen and 30 litres of dinitrogen were taken for reaction which yielded only 50% of the expected product. What will the composition of the gaseous mixture under the aforesaid condition in the end?

What volume of hydrogen gas at 273 K and 1 atm pressure will be consumed in obtaining 21.6 g elemental boron (atomic mass = 10.8) from the reduction of boron trichloride by hydrogen? 

Which has maximum number of atoms? 

The maximum number of molecules is present in

4 g of copper was dissolved in concentrated nitric acid. The copper nitrate on strong heating gave 5 g of its oxide. The equivalent weight of copper is 

Number of atom of oxygen present in 10.6 g Na₂CO₃ will be 

A sample of phosphorous trichloride (PCl₃) contains 1.4 moles of the substance. How many atoms are there is the sample?   

116 mg of a compound on vaporisation in a victor Meyer’s apparatus displace 44.8 mL of air measured at STP. The molecular weight of the compound is  

100 g CaCO₃ is treated with 1 litre of 1 N HCl. What would be the weight of CO₂ liberated after the completion of the reaction?