Question

How many no. of Hydrogen atoms present in 90g of water?
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Answer 1

Answer:

2 hydrogen atoms present in 90g of water

Explanation:

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Answer 2

Answer:

mole of water⇒ 90/18 = 5 mole

water is H2O which mean hydrogen have 2 times more moles than water

hydrogen moles = 10

moles x avogadro = total atom

avogadro =  6.022×1023

10 x  6.022×10^23 = 6.022x10^24

                                           ↑ the answer