Wednesday
April 1, 2015

Homework Help: science

Posted by stephii on Tuesday, June 12, 2007 at 5:53pm.

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.

ok

thank you

now i get it

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - How do I calculate the number of atoms in a compound (not an element...
How do I calculate the number of atoms in a compou - I have the mass of the ...
chem - when a chemical reaction takes place, the number of atoms of each element...
Science - When determining the formula for a compound, it is important to know ...
chemistry - Isotopes (select one or more): are chemicals that react only with ...
biology - Allegra is a blockbuster allergy medication that generated over $1.8 ...
Chemistry - When determining the formula for aacompound, it is important to know...
science - radioactive decay occurs when atoms a) lose mass b) join with atoms of...
Science URGENT - Write down the number of hydrogen and oxygen atoms of the ...
CHEMISTRY - what is the symbol for chromium (II) sulfate? You mean the formula? ...

Members