1.Assertion: Ratio of mass of hydrogen to the mass of oxygen in water samples collected from a well and a pond isthe same.Reason: In a chemical substance, elements are always present in the same proportion by mass.
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water is always present as a compound of fixed ratio of hydrogen to oxygen (2:1) . therefore a water sample will also have a particular ratio of mass and hence mass of hydrogen to the mass of oxygen in water samples collected from a well and a pond is the same. please mark me brainliest if possible .
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