2The molecular formula of water is H2O. It contains 2 atoms of hydrogen.H2O =2 atoms of hydrogen.
The hydrogen atom has only one electron.
One! You may mean to ask how many atoms there are in one molecule of oxygen, in which case the answer is two.
Magnesium nitrate is MgNO3 and there are one magnesium atom one nitrogen atom three oxygen atoms no potassium atoms
Water is a molecule made of three atoms (one oxygen and two hydrogen) and the concept of the electron octet applies to atoms, not to molecules. Oxygen, with six valance electrons, can acquire an octet by sharing the electrons of two hydrogen atoms, each of which have one electron. So the water molecule is self contained, it does not need any more electrons.
1
10
2.4088x10^24
These atoms decide the chemical composition of the substance.
2The molecular formula of water is H2O. It contains 2 atoms of hydrogen.H2O =2 atoms of hydrogen.
Lithium hydroxide has three atoms in it, one each of lithium, hydrogen, and oxygen. Also note that lithium is Li, not LI. Little details matter to chemists. A capital I means iodine.
The molar mass is the sum of the atomic weights of atoms contained in the molecule.
9 moles (there are four oxygen atoms for every mol of BaSO4, so you multiply 2.25 by 4)
One carbon atom and 2 oxygen atoms per molecule.
All the letters in the formula should be capitalized, and the formula shows that there are two hydrogen atoms, one sulfur atom, and 4 oxygen atoms in each molecular unit, for a total of 7 atoms.
No one knows how many atoms are in a sponge. There has to be billions of atoms because in one strand of your hair there is about a million atoms.
A molecule is a combination of atoms. To know how many atoms are in one molecule, you have to find out what atoms are in the molecule.