Two elements, X (Atomic mass 16) and Y (Atomic mass 14) combine to form compounds A, B and C. The ratio of different masses of Y which combine with fixed mass of X in A, B and C is 1:3:5. If 32 parts by mass of X combine with 84 parts by mass of Y in B, then in C, 16 parts by mass of X will combine with _______.

Two samples of lead oxide were separately reduced to metallic lead by heating in a current of hydrogen. The weight of lead from one oxide was half the weight of lead obtained from the other oxide. The data illustrates _______.

In chemical scale, the relative mass of the isotopic mixture of oxygen atoms (₁₆O, ₁₇O, ₁₈O) is assumed to be equal to _______.

What mass of CaO will be obtained by heating 3 mole of CaCO₃? [Atomic mass of Ca = 40]

Electrochemical equivalence has unit _______.

The empirical formula of a compound is CH2O. 0.0835 moles of the compound contains 1.0 g of hydrogen. Molecular formula of the compound is ________.

Which of the following has maximum number of atoms?

Two elements X (Atomic mass 75) and Y (Atomic mass 12) combine to give a compound having 75.8% X. The empirical formula of the compound is _______.

Which of the following is the value of amu?

After a chemical reaction, the total mass of reactants and products _______.