Question

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Answer 1

Answer:

Answer

The atomic weight of oxygen is 16. The atomic weight of the element X can be either 7 or 14.

One mole of the oxide will contain one mole (16 g) of oxygen atoms and one mole (14 g, if atomic weight of X is 14) of X atoms. Its formula will be XO.

One mole of the oxide will contain one mole (16 g) of oxygen atoms and two moles (14 g, if atomic weight of X is 7) of X atoms. Its formula will be X

2

O

Thus option C is the correct answer.

Answer 2

• Cel is the functional unit of life .It was discovered by Robert Hooke.
• Matter is very minute particle.
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