How do you find out the number of atoms in a chemical formula?

Count up the number of atoms in the formula. If there is a subscript n after an element sytmbol, there are n or those atoms in the molecule. If there is no subscript, there is only one atom of that element.

If an element symbol appears more than one, treat each separately.

For example, for C2H5OH, there are 2 C's, 5+1 = 6 H's and 1 O for a total of 9 atoms.


thank you

now i get it

  1. 👍 0
  2. 👎 0
  3. 👁 173
  1. This is fake cause anyone could post

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. science

    1.the modern atomic model includes orbiting the nucleus. which of the following parts of dalton's was disproved by the discovery of the electron atoms are tiny particles atoms cannot be divided into smaller parts atoms have

    asked by alex on September 30, 2015
  2. Science

    How Is a compound different from a mixture? it is made of one substance It cannot be made of organic materials It cannot be broken down It cannot be separated by a physical change I don't know  This formula shows the chemical

    asked by Anonymous on April 12, 2018
  3. chemistry

    What kind of atoms typically have unstable nuclei? atoms with a neutron count greater than 90 atoms with a neutron count less than 90 atoms with a proton count less than 90 atoms with a proton count greater than 90 is it d?

    asked by check answer please on September 7, 2017
  4. biology

    Allegra is a blockbuster allergy medication that generated over $1.8 billion in global sales in 2004. Allegra, or Fexofenadine, decreases allergy symptoms by inhibiting the action of histamines. Histamines are naturally occurring

    asked by selly on March 12, 2013
  5. chemistry

    balance this equation. prove that it obeys the law of conservation of mass by using formula masses. HNO3 + Mg(OH)2 ---> HOH + Mg(NO3)2 is this balanced? 2HNO3 + Mg(OH)2 ---> HOH + Mg(NO3)2 I don't understand the formula masses

    asked by mike on May 14, 2007

    what is the symbol for chromium (II) sulfate? You mean the formula? CrSO4 yes! thanx!!!!!! do u know how to find the number of molecules or atoms in a mole? The number of atoms in a mole is called Avogadro's number, the value of

    asked by INEEDHELP!!! on December 4, 2006
  7. Chem help!!!!

    I am supposed to find 2 food labels that have high chemicals in them. This is the instructions he gave us: Highlight all CHEMICAL names on the label (DO NOT COUNT wheat, flour, sugar, salt, oils, salt, etc) (however dextrose would

    asked by Samantha on April 18, 2011
  8. Chemistry (The Composition of an Atom)

    In 1808, John Dalton wrote his atomic theory of matter. The following is a list of points from that theory. If it is still considered true today, label it true. If it is not considered true today, label it false. 1)Atoms cannot be

    asked by Andy on April 14, 2011
  9. chemistry

    calculate number of atoms in 4.67 mol of Ca(NO3)2 I got: 2.81 X 10^24 C atoms or should it be 28.11 x 10^23 C atoms? 5.62 X 10^24 N atoms or should it be 9.34 x 10^23 N atoms? 1.69 x 10^25 O atoms....but are you allowed to do ^25

    asked by Sarah on May 23, 2008
  10. science

    H20 (water) indicates there are _____. A.two hydrogen atoms and one oxygen atom in this chemical formula B.two oxygen atoms and one hydrogen atom in this chemical formula C. water is an acid im saying b but not sure

    asked by 20four on May 17, 2019

More Similar Questions