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How many total atoms are in H2O?

Answer
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Hint: An atom is the smallest unit of ordinary matter that forms an element . Every solid, liquid, gas, and plasma consists of neutral or ionized atoms. Atoms are extremely small, typically around 100 picometers across.

Complete answer:
There are three atoms during a water molecule: an oxygen atom and two atoms of hydrogen, which are bonded together like small magnets. The amount of atoms present within each molecule represents the second factor. 4 hydrogen atoms and a couple of oxygen atoms are found in two water molecules. There are 2 moles of hydrogen atoms during a mole of water molecules and 1 mole of oxygen atoms.
Two hydrogen atoms and one oxygen atom form a water molecule. In its outer shell, one oxygen atom contains six electrons and may accommodate a complete of eight electrons. The outside group of oxygen is filled as two hydrogen atoms are sure to be an oxygen atom.
An atom is the smallest particle of a component , like oxygen or hydrogen. Atoms join together to make molecules. A water molecule has three atoms: two hydrogen (H) atoms and one oxygen (O) atom. That's why water is usually mentioned as H2O.
The scientific term for water is H2O. This suggests that in each water molecule there's two hydrogen atoms and one oxygen atom.

Note:
 If you've got a sample that contains only atoms of a specific element, weigh the sample in grams and divide by the relative atomic mass of the element. The quotient tells you the amount of moles. Multiply that by Avogadro's number , and you will determine what percentage atoms the sample contains.