Question

How many moles of hydrogen atoms are present in 1 mole of $H_{2}O$?

• A. 2
• B. 1
• C. 4
• D. 3

Answer 1

The correct option is A

2

1 molecule of water contains 2 atoms of Hydrogen and 1 atom of Oxygen, therefore, every mole contains Avogadro's number of Oxygen atoms and 2 times the Avogadro's number of hydrogen atoms.