In 2H2SO4, there are a total of 2 sulfur (S) atoms, 8 hydrogen (H) atoms, and 4 oxygen (O) atoms. Each molecule contains 2 hydrogen atoms, so the total count is doubled from the molecular formula.
The chemical formula shows you this. The subscripted number next to each element shows how many atoms are present in a molecule or formula unit. If no number is shown, then only one atom of that element is present.
You can determine the number of atoms of each element in a compound by using the chemical formula of the compound. The subscripts in the formula indicate the number of atoms of each element. For example, in H2O (water), there are 2 hydrogen atoms and 1 oxygen atom.
There are 4 calcium atoms, 8 chlorine atoms, and 2 carbon atoms in 4CaCl2 (calcium chloride).
The compound is sulfuric acid (H2SO4), containing 2 hydrogen atoms, 1 sulfur atom, and 4 oxygen atoms. Therefore, in 2 molecules of sulfuric acid (2H2SO4), there are a total of 4 hydrogen atoms, 2 sulfur atoms, and 8 oxygen atoms.
2H2SO4 means that there are two molecules of sulfuric acid, H2SO4, present in the chemical reaction or compound. It indicates that the coefficient of H2SO4 is 2, meaning that there are twice as many sulfuric acid molecules compared to other molecules in the reaction.
The chemical formula shows you this. The subscripted number next to each element shows how many atoms are present in a molecule or formula unit. If no number is shown, then only one atom of that element is present.
7
You can determine the number of atoms of each element in a compound by using the chemical formula of the compound. The subscripts in the formula indicate the number of atoms of each element. For example, in H2O (water), there are 2 hydrogen atoms and 1 oxygen atom.
there are 3 in tottal
2
Some elements have isotopes - atoms with a different number of neutrons.
1
In each molecule of NO3, there is one nitrogen atom and there are three oxygen atoms.
The chemical formula shows you this. The subscripted number next to each element shows how many atoms are present in a molecule or formula unit. If no number is shown, then only one atom of that element is present.
At standard temperature and pressure, nitrogen exists in molecules with two atoms each.
4 carbon 16 hydrogen
How many atoms are in Mg3(PO4)2