<span>In chemistry, the law of definite proportions, sometimes called Proust's law or the law of definite composition, or law of constant composition states that a given chemical compound always contains its component elements in fixed ratio and does not depend on its source and method of preparation. An equivalent statement is the law of constant composition, which states that all samples of a given chemical compound have the same elemental composition by mass.</span>
Compound= many parts together therefore bike is the answer
According to law of conservation of matter and energy, amount of both of them will remain same
1 mole of NaCl contains 6.022×10^23 particles
∴. 922 moles of NaCl contains.... (multiplication of the 2 numbers)