Helloo.. i got a worksheet about compounds,elements andnumber of elements. it tells me to list the elements and number of atoms found in each of the compounds and i don't understand how to do get the elements and the # of atoms in the equation.. PLease help me..!!!
Common Name- Rubbing alcohol
Compound- C3H7OH
Elements-________
# of atoms of element-___________
Please and Thank You! :)
The formul for rubbing alcohol (isopropyl alcohol) is C3H7OH.
You have three elements; i.e., C, H, and O. I'm sure that what you are to do is to use a periodic table and find the element and symbol. C is carbon, H is hydrogen, O is oxygen.
How many elements? Look at the subscript (we can't write subscripts but the number following the element is a subscript). In this case, there are 3 C atoms, 8 H atoms (H is written twice, once with 7 and once by itself), and 1 atom of O.
The number of different elements is the number of different letters that appear. (Most elements are represented by a pair of letters, only the first of which is capitalized.) In this case, the different elements are C, H and O.
To get the number of atoms, note that there are 3 C atoms, 8 H atoms and one O atom in the formula. Add up those numbers.
Why would you have to add those numbers up?
Because the want the number of atoms of ANY type in the C3H7OH molecule.
how would you know how much each is worth? if you look it up in the periodic table.... is it always the same number amount of atoms for the elements?
how would you know how much each is worth? if you look it up in the periodic table.... is it always the same number amount of atoms for the elements?
Each atom in the formula counts as an atom, no matter how big it is. If they had asked for the mass of the molecule, then you would treat each one differntly. C weighs 12 times as much as H, for example.
All they asked for was the NUMBER OF ATOMS in the molecule, not the weight or mass of the molecule.
okay. I think I understand it now. Thank you.
Of course, I'd be happy to help you with your worksheet on compounds, elements, and the number of atoms. Let's break it down step by step.
First, you have a compound called rubbing alcohol, which is represented by the chemical formula C3H7OH. This formula tells us the elements present in the compound. In this case, the elements are carbon (C), hydrogen (H), and oxygen (O).
To find the number of atoms for each element in the compound, you need to analyze the subscripts in the chemical formula. The subscripts indicate the number of atoms of each element present in the compound.
Let's take a look at each element and count the number of atoms:
1. Carbon (C):
The subscript written after the symbol C is 3. This means that there are 3 carbon atoms in the compound.
2. Hydrogen (H):
The subscript written after the symbol H is 7. This means that there are 7 hydrogen atoms in the compound.
3. Oxygen (O):
The subscript written after the symbol O is 1. This means that there is 1 oxygen atom in the compound.
So, the elements present in rubbing alcohol (C3H7OH) are carbon (C), hydrogen (H), and oxygen (O), and the number of atoms of each element is as follows:
- Carbon: 3 atoms
- Hydrogen: 7 atoms
- Oxygen: 1 atom
Remember, in a compound, the subscripts represent the number of atoms of each element. By analyzing the chemical formula, you can determine the elements and their corresponding number of atoms.
I hope this explanation helps you understand how to determine the elements and the number of atoms in a compound. If you have any more questions, feel free to ask!