Question

how many H atom are present in 36 g of water
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Answer 1

Answer:

Explanation:

To start with there are 2 hydrogen atoms in a molecule of H2O.

In 1 mole of H2O, there are Avogadro number of molecules of H2O.

                                              .i.e, 6 x 10^23 molecules of H2O

As there are 2 hydrogens in a molecule of water,  

1 mole of H2O contains "2 x (6 x 10^23)" atoms of hydrogen.

36 grams is 2 moles of H2O.

So, 2 moles of water (36 grams) contain

"2 x 2 x 6 x 10^23 = 2.4 x 10^24 atoms of hydrogen.

Answer 2

Answer:

4

Explanation:

There are 4 moles of hydrogen atoms in 36 grams of water.

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