Percentage of Se in peroxidase anhydrase enzyme is 0.5% by weight (atomic weight  = 78.4), then minimum molecular weight of peroxidase anhydrase enzyme is

Which law states that during any chemical or physical change, the total mass of the products obtained is always equal to the total mass of reactants taken at the beginning of the change ?

Which law says when two or more gases react with one another, their volumes bear simple whole number ratio with one another and to the volume of products provided all volume are measured under identical conditions of temperature and pressure ?

The equation E= mc² is introduced by

10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded.  Amount of water produced in this reaction will be

What volume of oxygen gas (O₂) measured at 0^o C and 1 atom is needed to burn completely 1 L of propane gas (C₃H₈) measured under the same conditions ?

Number of moles of required to oxidise one mole of ferrous oxalate completely in acidic medium will be

The number of moles of KMnO₄ reduced by one mole of KI in alkaline medium is

The number of oxygen atoms in 4.4 g of CO₂ is