If 30mL H2 and 20mL Of O2 react To Form Water, What Is Left At The End Of The Reaction? 

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?   

A gas mixture contains 50% helium and 50% methane by volume. What is the percent by weight of methane in the mixture?

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? 

If we consider that , in place of , mass of carbon atom is taken to be relative atomic mass unit, the mass of one mole of a substance will

For the formation of 3.65 g of hydrogen chloride gas, what volumes of hydrogen gas and chlorine gas are required at N.T.P. conditions? 

An alkaloid contains 17.28% of nitrogen and its molecular mass is 162. The number of nitrogen atoms present in one molecule of the alkaloid is

How many moles of magnesium phosphate, Mg₃(PO₄)₂ will contain 0.25 mole of oxygen atoms?

The decomposition of a certain mass CaCO₃ gave 11.2 dm³ of CO₂ gas at STP. The mass of KOH required to completely neutralize the gas is