Question

please answer the questions guys fast answer it

Answer 1

Answer:

Step-by-step explanation:

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Answer 2

given atomic weight of helium is 4.0030 , hydrogen is 1.0080 and oxygen is 16.0000.....

(i) diff. of atomic weight between oxygen and hydrogen is =
atomic weight of oxygen - hydrogen =16.0000-1.0080 = 14.992.

similarly find the answer of second question...