If you have 100 grams of water, how many grams of elemental hydrogen do you h
o 1800 grams
11.2 grams

11.2 g

Explanation:

Given data:

Mass of water = 100 g

Mass in grams of hydrogen = ?

Solution:

Number of moles of water:

Number of moles = mass/ molar mass

Number of moles = 100 g/ 18 g/mol

Number of moles = 5.6 mol

It is known that one mole of water contain two elemental hydrogen.

Thus in 5.6 moles,

5.6 ×2 = 11.2 mol

Mass of hydrogen:

Mass = number of moles ×molar mass

Mass = 11.2 mol × 1 g/mol

Mass = 11.2 g

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