How Many Moles Of Magnesium Phosphate, Mg3(PO4)2 will Contain 0.25 Mole Of Oxygen Atoms?

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

If 30mL H₂ and 20mL of O₂ react to form water, what is left at the end of the reaction? 

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 

1.520 g of hydroxide of a metal on ignition gave 0.995 g of oxide. The equivalent weight of the metal is 

The number of g-atom of oxygen in  CO molecules is